Just can't get it to sync with Apple Health or ...
353815
Just can't get it to sync with Apple Health or Nike+ NRC.  I think the problem is the Health app but either way if it doesn't work in NRC, it is dead to me.
1900447
And 7 months later, I need a new fitbit. I am disappointed that although I updated my device to a Blaze in May and before December I can't get my device to sync. So $150 wasted.
1366993
It took a while to get it up an running.  The documentation tells you to upgrade the firmware first thing, so that's what I tried to do. I use Mac computers and wasn't able to get any of my computer to recognize the Sena 20S, I tried 3 different computers.  I tried to contact customer support for some help, but didn't hear anything.  I googled for some help and found out that some say that the Sena Device software doesn't work with any of the last few recent Mac OS.  So I booted to a pretty old version of Mac OS that I had on a spare drive.  I was able to update the firmware with this work around.  A friend who had the same issue, was able to do his update using a PC.  I did finally hear back form Sena support, but after a couple exchanges they never verified if the Sena software works with some of the more recent versions of Mac OS.

I mounted the unit on a Nolan N104 modular helmet.  The clamp attachment will not work with a modular helmet, the rim is too thick.  I did find a video from Sena that show how to mount the unit on a Schuberth modular helmet, I followed those instructions and with a little adaptations was able to get everything mounted.

The 20S does a lot of things and because of this there are a lot of button combinations that are necessary to get the different features to work. I had no problems pairing my iPhone, Garmin GPS, and another 20S to use the intercom feature.  A friend and I went out for a 4 hour ride and mostly used the intercom feature and it worked great.

The iPhone software for making adjustments to the settings, still thinks that I have the old firmware and so I rebooted my Mac to the old OS and re-downloaded the update, but the iPhone software still says I have the old version.  Sena support has given me some instructions that is suppose
to fix this.  Also, this iPhone Sena software doesn't seem to want to recognize a device when there is another device using the software on a different iPhone.  Like, two people in the same room can't make adjustments.

I like how this works so far, though it was a bit of a challenge to get it mounted and up and working.  I look forward to using some of the other features
2944634
Despite saying "charging cable" and listing the iPhone 3gs in the compatibility list, my 3gs pops up "Charging is not supported with this accessory" as soon as the cable is plugged in. iTunes can use it to synchronize, but only when explicitly told to - auto-sync seems to also be disabled, with the charging.

For the price, it isn't worth the trouble to return them, since they CAN be used to transfer data, and I have other cables that work for charging.

Update: Further testing shows that ONE of the three cables is recognized by the 3gs as a charging cable, and iTunes will auto-sync using it. However, the other two are treated as if they were old Gen-3/4 iPod cables... In fact, plugged into my old iPod, the "bad" cables charge and synchronize it without problem.
4239725
Downloaded the app and the camera wouldn't sync up to my phone.  It just seems like more of a hassle than anything else.
3149699
Right now, I'm super disappointed.  I have been working on trying to get this ipod to sync to my itunes account for 4 hours and NOTHING. I've tried restarting both computer, ipod, Installing updates, and I keep getting same message. Ipod can not connect to itunes for unknown reason. Waste of money and will be upset if i get zero help on fixing this issue and will be returning.
3267867
It's not syncing or updating my information.  Tracking sleep is always a week or two behind.  Very frustrating.
4658021
I like the idea of it and enjoy the thermos app.  That said, this will not sync with my fitbit app and I find that to be frustrating.  Also, once I filled it, the lid no longer pops open as it is supposed to about 70% of the time.
3644343
I have two of these and neither one will connect to Samsung S6 Bluetooth.  I ended up buying a different health band.
2656828
I am returning the product, Apple should work with 3rd party cables. It will charge but not sync, to bad.
3201972
Over a year ago, I bought a Mio Fuse HR for myself and a Fitbit Charge HR for my girlfriend. The Fuse has always had problems syncing with my iPhone. Data I've deleted from workouts months ago comes back for no reason and recent days' activities sometimes never appear at all. I've contacted their Support staff on multiple occasions, downloaded firmware updates and have only ever had temporary satisfaction with the product. I've finally given up on it and will not use it again. If you're trying to decide between this and the Fitbit, I suggest you go with the Fitbit.
3767343
I purchased the watch assuming that it interfaced the heart rate data to an app on my iPhone. After getting the watch, I was told by the Customer Service desk that the company was having some "compatibility issues" with the iPhone and they did not know which future version of the iPhone software was going to be compatible. Since iPhone app compatibility was why I bought the watch in the first place, I decided to return the watch. I switched back to using a Polar Heart Rate strap with my iPhone app. While I would prefer not to have to wear a strap to get HR data on my iPhone app, I had no other choices. Maybe they will get this issue resolved in the future.
337916
Not the adapter's fault, I think.  It is just not syncing something I wanted it to.  I'm not a technological person, so haven't spent much time trying to figure it out past the initial try.
2867210
I'm sure that the Mini Jambox has great sound.

I'm sure that the Mini Jambox has great features.

Unfortunately, I can't confirm this for myself because the device simply won't work.  After hours of fiddling, I could not get the device to sync with my MBP, my iMac, or my iPad.  The mini simply would not appear (at all) on the list of bluetooth devices.  I then spent hours searching the internet for possible fixes...including fixes.  The suggestions (which, ironically enough, came from some other users on the Jambox forum) to delete plist files off of my machines didn't work either .

I had also submitted a help ticket to Jawbone support.  I waited and waited and finally was contacted (only after complaining on Twitter).  I played phone tag with the customer support rep.  I guess he decided that my issue wasn't important enough because I've now left 3 unreturned messages.  I'm still exactly where I started...and its been two weeks.

So, not only does the hardware have issues, but the it seems to be amateur hour at Jawbone customer support.

Incredibly frustrated given how much the mini cost.  I wonder if I wrapped a note documenting my problems around the mini and threw it through their window they would actually help me out.
2680491
Does not allow me to set the time, won't track my steps,  and no heart monitor now. I've only had Apphealth 7 months .
786608
It works well as far as tracking steps and distance, but does not sync properly with the app, some days it would not sync at all or only after numerous attempts. I've not had this probably with other FitBits so not sure if it's just this model.
2707877
I really wanted to like this product. My Up3 band function seems okay and it does a good job of recording steps and heart rate (when it hasn't fallen off). Syncing with the app is embarrasingly bad. The app does not sync at all most of the time and when it does, the data is incorrect. It doesn't allow for water tracking at the touch of the + on the home screen.  Multiple sections of the app do not save without multiple screen presses (or at all). If the software team is releasing Minimum Viable Products, they need to reset their standards.