Not ready for prime time
931661
I adopted this text for a new graduate course that I taught on Metric Geometry.
The other choice was `Spaces of Nonpositive Curvature' by Bridson and Haefliger.
I chose this text because it has exercises, it appears to cover nonpositive and
nonnegative curvature in roughly equal proportion, and it's less than half the price of Bridson-Haefliger.

Unfortunately, the book has many, many typos. Fortunately, there is an errata
consisting of ten pages that can be found by googling "burago burago ivanov errata".
(Actually it's more than just a list of typos: They correct a few false proofs as well).
But beware! This list of errors is not complete.
My students and I have found other typos as well. Of course, a well-trained
mathematician can get past the typos, but this text is supposed to be for first year graduate students.

The writing is also rough in places. For example, polyhedral complexes
are not rigorously defined. The style is Russian which I like, but it's
not the best example of this type of writing. The students have told me that
they avoid reading the text whenever possible.

The one redeeming feature may be the exercises. Some of the exercises
are excellent. Also the overall choice of topics is very good.

With additional work this could be a great textbook, and (five years later)  I am still hoping that the
authors will take the time to go through it at least a couple of more times.

For now, I have switched to Bridson-Haefliger. I have abandoned this book.
3975628
Neat is not so neat or as another reviewer put it it's not ready for prime time.  I purchased my neat scanner with software bundle at Staples which was lucky for me because Amazon would not have taken it back.  When I installed the scanner and software the first day it worked fine though the process was cumbersome and the documentation even on line is skimpy.  You have to learn by trial and error pretty much though fortunately the interface is pretty straight forward.  After learning to ropes so to speak and scanning a few receipts I had killed an afternoon.
The next day I booted my computer and the software would load but would not accept my password or username.  Since the only way to get to tech support is to have a user name this presents a challenge.  I finally googled enough to find a phone number but this was just a computer with many firewalls to keep you from accessing tech support.  It repeatedly asked me to spell my user name which apparently it couldn't understand until I had repeated it about 20 times (I'm persistent and at this point pissed.). When it finally recognized my user name I jumped through some more computerized hoops and got to talk to a real person in India.  He exclaimed  Oh yea a lot of your users have been having trouble logging in this morning.  I'll send you an email with a link to an website where you can log in.  I've unlocked your account.  He gave me what he said was a direct phone number in case I had further problems. I waited for the email and followed the link.  It simply took me to the same website I had been trying to log in on previously and it still rejected my user name and password as invalid.  Mind you I had carefully written them down the day before and logged in and out several time with this password which I had saved in KeePass my password management system.

So I called the special number that the person in India gave me and it turned out to be the same computer firewall designed too keep me out of tech support.  This time it apparently recognized my spelling right away but announced there was no such account and that I should create one for a 30 day trial.  No access to tech support at all now.  Furthermore my software will no longer load even after deleting/uninstalling it and reinstalling.  At this point I gave up and took the whole bundle back to Staples for a refund.

What else can I say.  Read the reviews. It's not just me.
4683458
There is a lacking in tech manuals that really mystifies me.  Someone designed this device with an approach that made sense to them; but that approach was not translated well.  Describing "feature-feature-feature" without an overview is frustrating.  It took many hours and angst before I got it running.  There are so many different signal flow options, it was simply trial-and-error, but how about an EXAMPLE?  One important point for future buyers with a Macbook Pro.  You have to UNPLUG IT from your power source otherwise there is a horrible hum.  Now...you would think that such an important detail would be mentioned in the manual.  In the meantime, I tried for hours to figure what might be causing it, including the possibility the unit was defective.  I contacted tech support who wrote back apologizing for the delay.  By that time, I figured it out.  Now, having said that, it does operate quietly.  The overall sound quality is OK, but not as good as I expected.  I did much research before choosing this model.  Being able to utilize the firewire connection leaves 2 USB ports free for other inevitable devices, etc.
2982572
Great product in theory. Many problems syncing and getting to run smoothly.
4783986
I love Tivo. When my series 3 died, I was happy to splurge on a new Premiere Elite. But it is unbearably slow - literally two minutes sometimes to move from one menu to the next. This design and user interface is seriously broken. It is absolutley not my network; I have top speed Fios internet at >30 Mbs. I cannot express how disappointed I am; think hard about a decision to invest in this box; the whole value proposition of a superior user experience with Tivo is uncertain here.
276835
Not worth the money.  Not that user friendly for how simple it should be.
2862186
Nice concept. But poorly executed. Major work is needed to make the user interface usable, stable, fast, and functional.
At the moment, the software takes forever to start up.  Setup is clunky and awkward.  Product libraries are incomplete and inconsistent.
Bugs in certain devices (DirevTV DVR) get stuck sending endless loop of IR commands.
Feels like it was designed by engineers with little or no UX (User Experience) understanding or background.
Wait for some major software revisions before considering to purchase.
2764981
This model was never ready for prime time.  Despite firmware updates and TS help, it never quite worked from a distance, nor did the battery life improve.  There is a new model and name, but information comparing this to the old model in terms of reliability is sparse.  There is also no program to help the abandoned early adopters from V1 - changing your name won't change your reputation!  This is a great idea- like teleportation- that does not achieve utility.
1790730
This device has been trouble from the start. The webcam did not work, so I upgraded Windows, then I lost internet connectivity and I had to go back to a previous version of Windows. The Hulu app does not work with this version of Windows. Trying to stream video through a web browser (work around the Hulu app issues) is frustrating, it's glitchy and freezes. I have had trouble with "ghost touches" on the screen. I have done two system restores to try and fix the problems but new issues just crop up. Definitely returning the device.
2075068
Just bought it and set it up.  I happen to have an IT consultant who worked with me on it.  The real issue with this device is the very poor motion detection.  It will not detect motion more than about 8 feet from the camera.  Additionally, it waits at least a couple of seconds before it starts recording so you miss a lot.  This is a huge issue with this camera in any kind of monitoring situation.  I really wanted to like it and was poised to buy more, but now I may have to return it to Amazon.

Now that we have figured out the user interface (they need to update it) the sensitivity is much better.  Basically change to more videos and you get good detection.  I still have not figured out how to get it to start recording within less than 1 second of motion detection.  Seems like a good 2-3 second delay.  It looks like they have some decent hardware which is made very difficult by the user interface.

The user interface is terrible however the customer support and hardware is decent.  A big glitch is the recording time from when movement is detected.  I would have to guess at least 2-3 seconds which in many cases is enough for someone to move out of position when using it to monitor.  Not sure why it has to take this long to start recording.
769829
Let me begin by saying I REALLY wanted to like this device. It is a GREAT concept, but it is unreliable with too many flaws in performance combined with nonexistent technical support. Wish I had returned this product for a full refund when I had the chance instead of trying to work with Kuna to fix their light and service. ***If your device works, all is good until you have problems with it.***  I even received a warranty replacement device with the same problems!

Live Feed Problem - it has never worked on the device (or the warranty replacement). Instead of bringing up a live video feed, it brings up a still image from a previously recorded event with no sound. The microphone works, and you can manually record from Live View (evidence my wifi functions properly); however, it fails to generate a live video so you have no idea whats happening at your door.

***It is important to mention that motion activated events record properly (further confirmation my wifi connection is not the problem).***

Poor Processing Time (Kunas Servers) - it takes 30 to 60 seconds to load Live View. I have also notice there is a long lag from the time when an event occurs to receiving alert notifications and recordings to my phone. My other wireless security cameras video-recordings and notifications (from two different brands) are instant including one thats outdoors 32-feet from my router while the Kuna device is only 16-feet. This is another reason why I suspect Kunas Servers.

Kunas Server Issues - It is obvious that Kunas Servers (and backend service) are erroneously picking up an image from a previously recorded event and presenting it as a false Live Feed view.  So it is ludicrous for them to continue blaming my wifi as the source of this problem.

***I am beginning to wonder if I am experiencing this issue because I do not subscribe to their premium services.***

Nonexistent Technical Support (Jolly Technologies) - Unfortunately, their initial response is to fix a problem is to power cycle their device, your modem and router -or- to continue blaming your wifi as the problem instead of addressing the real issue. When they do not know how to fix the problem, you get the silent treatment (unanswered voicemails and emails requesting to speak with an engineer or supervisor). When you call their support number, you usually get their voicemail - not a live representative.

Warranty - I did receive a warranty replacement, which of course does NOT display a Live View video feed because the device (and my wifi) is not the problem. It is their Servers and backend service. Their denial of the real problem is indicative of how they handle problems and treat their customers.

Bottom-line: Too many other customers have consistently reported problems (laggy videos, no Live View, delayed alerts, bugginess and nonexistent support) for my situation to be an one-off event.
3372634
Good concept, but -- at this point -- way too buggy and frustrating to use.
4364631
software buggy and not intuitive. Setup did not work out of box had to spend a lot of time on line trying to find a fix
2823851
After purchasing this product I was excited about the potential of eliminating a PC in my living room... I was wrong, while the product does offer wifi connectivity, plays your photos and home videos in Full-HD 1080p. It is a pain in the butt to use. Audio and Video must be rerouted from the box to the TV then to your sound system. If you use the included cables... you would have to pick HDMI or the proprietary AV cable it comes with...  sound becomes a wiring issue.

I have been using for only watching video and pictures that I own (confused?). This product, like many others offer built-in apps that do really nothing for the user, yes if you subscribe to one or more of the paid services it will connect you to them, but the apps really suck and like all smart devices - get abandoned (my only wish is that they use Android apps in their future products). other than that - for $99 it's not worth it if you still have to install a computer in your living room. In the future I am just going to opt for a stick PC (Atom Processor) for the same money and at least get to surf the web.  [...]
1420911
I purchased the Logitech Harmony 1100 about 6 months ago to replace the Logitech Harmony 600, which I liked. I was looking to upgrade to a one-touch remote with RF capacity and extended capability. The remote looks good. That's about it. It is difficult to setup. The RF extender is fairly simple to install, but the software for the system is a real problem. Even after following the instructions, I had to spend a lot of time on the phone with support. Although the support person was polite and knowledgeable, it took us a couple of hours to get the remote programed and operating.

Using the remote is not as simple as it should be. The touch screen is often not responsive and it is not unusual for the remote to need several attempts to complete the programed activity. Using the "help" button became routine. Then, after about 6 months, the remote stopped working. I had to reload the firmware, reload the software, and reprogram several activities. As of this moment it has stopped working again and will require some serious computer and support time to get it operating to spec again.

When I purchased the 1100 I had an internal debate as to whether I should get the 1100 or the 900. I think I made the wrong choice. The concept is good, and when it works, it is an okay remote, but the design/software execution is very poor. This may be a good remote for someone who is an "expert-level" technophobe, but it is a pain in the butt for average users.

Save yourself some frustration and aviod this one.
3035650
This is one of the most amazing electronic gadgets yet conceived. Sadly it's not ready for prime time. There are too many problems. I had two of them and  both had major issues. One had a bad screen and the other wouldn't load. As far as I'm concerned two tries with a product is enough. Hey Apple, next time you release a product you may want to be sure the majority of them work properly. Especially as $399 a pop.
4475796
Takes a solid 30 mins of troubleshooting each time you want to pair a device. It's a constant issue. It's an expensive paperweight that will be making its way to a garbage can soon.