It works and the sound is pretty good. The design needs another go at it.
594117
I bought this three weeks ago to use with my laptop after the internal speakers decided not to work anymore.  The sound is better than my laptop's speakers.  I like the convenience of being able to have my laptop in one spot and the speaker nearby.  That said, the design of the speaker is frustrating.  First, finding and opening the little flap where the charging cord attaches is tricky, especially if the light in the room is not good.  Then, when one grabs the speaker to attach the charger cord one will often find that they've accidentally pushed the sound buttons which are on the opposite side of the plug. Most annoying are the ultra-bright Bluetooth and charging icons that blink and keep a dark room half lit.  Sure wish they'd put the flap over that annoyance since I often listen to the radio through my computer at night. I also wish they'd made the controls a contrasting color. That said, this is still much better than no sound or dragging earbuds where-ever I go.
239401
When I opened the box, the first thing that struck me was that this speaker seems to be well built. there's a bit of weight to it and the whole sliding mechanism is pretty neat. It's the kind of stuff that if you put on your work desk a passerby would notice it. Then again, at about 60 bucks you'd expect it to look better than some of those cheapo plasticky mini speakers out there.

The sounds quality is decent. Some reviewers mentioned it has limited frequency range and it does. The bass effect is more or less muted. The mid tone sounds a bit hollow. However, as a whole it's still listenable.

My biggest gripe with it though is that if I were to play an mp3 file through my mobile device, and then plug this thing in and play it again - it really doesn't sound drastically different. May be about 40% louder (and I'm just guessing here, have not really done any scientific measurement), and the sound feels slightly 'richer', but nothing that makes me feel like it was worth paying 60 bucks for. Having said that, I suppose if this speaker is designed to make a whole lot of difference to the output sound, then it'll probably end up draining my mobile device's battery dramatically, or it'll require an external power source.

So I guess at the end of the day, it boils down to whether passive speakers in general are really worth it these days given that mobile devices speakers are improving. I think this is only worth the purchase if the device you're using has a really bad speaker. and you need a quick fix.
3191113
Sound is good.  The ear buds take some getting used to, since they can be painful.
3587203
Directions that come with it aren't great and you will have to get a real tutorial book in order to learn how to use it but it is fun, has a great sound and just right for the price.
4381457
Starting with the good, it's an elegant solution to a complicated problem. Most cars do not offer USB inputs and rely on AUX inputs for the MP3 player. Using this little dock allows you to skip the amp on you iPod. It still uses the iPod's onboard DAC (USB does not, which is why it still sounds better), but overall the sound quality is a lot better than if it is amped up in the iPod and then again by the car. Sound quality improved a lot for my Camry that has relatively bad speakers. Sound was improved for both Lossless audio files and 128KBPS AAC files. I would definitely recommend lossless (but if the speakers aren't very good it won't make too much of a difference anyways). Either way clarity was improved and bass response was a LOT better. It is also incredibly convenient to be able to charge the device using the mini usb cable both in general and while the device is playing music. Now for the bad. First off, the design is a little flawed. It sticks out of the phone quite a bit and is not entirely secure. It has a tendency to fall out or at least move a little so that one of the channels stops working. I almost wish it locked into place like Apples older iPhone cables which had the buttons on the side you had to squeeze to get the connector out. Although, I don't know if that's such a great idea because it might damage the phone if it gets pulled. It also uses mini usb which is less practical than micro usb which is more common. The worst part is the build quality. It looked acceptable at first (but not great). The problem is that it stopped working after about 6 months of use (other reviewers have noted similar results, with some breaking even more quickly). That's pretty disappointing. It is also pretty expensive for what it is. I might still recommend it because I haven't seen anything quite yet that can match the features and convenience, but only to someone willing to spend the money and aware that it may not work in a few months.  I will do a little more research to see if I like another product better and I will update this review.

Update (11/20/12):
If you are still looking for a product identical to this one Fiio recently released the L11, which is exactly the same as the SendStation (with slight differences). I have not used it myself so I cannot vouch for it but it is about 1/3rd of the price of the SendStation. It doesn't look like it's made of very high quality materials but in my experience all the Fiio products I've purchased have worked well and lasted, even the ones that looked like they were not built as well. It's also a little less convenient for car use because the AUX port and mini usb ports are on opposite sides of the adapter, instead of at the bottom like this one. In any case, it might be worth taking a look at it. I also tried out the "Kensington 2-in-1 Charger and Audio Cable for iPhone" with very bad results. it didn't work well and was very expensive (you can read my full review for more info). For now I've given up trying to find a solution with both line out and charging and will update this review again if that changes. If you are willing to give up the ability to charge your phone at the same time as providing a line out signal I recommend either the "Cables To Go 35508 iPod-Compatible 3.5 mm to Dock Connector Audio Cable" or "Fiio L10" cable. They are both good cables with different pro's and con's (which you can read about in my review of the Cables To Go cable). Lastly, I am maintaining the 3 star review, because even though the SendStation was very disappointing, I have not been able to find something to replace all of it's functionality.
1849438
The speaker design could be a lot better. The sound is not bad.
1. Every time its connected, disconnected or battery is low, a voice in a thick Chinese accent says it so. A minor beep could have sufficed.
2. The touch buttons on the top are easily touched un-intentionally, thus missing that fav radio song or breaking the song focus.
3. How does tapping a button marked as volume and it skipping/rewinding a song make sense? Either make it +/- to avoid confusion with volume.
4. Battery life is not 10 hours it was probably around 5 hours for me.
3970458
it has good sound and nice design. but after 3 hours one side stopped functioning. I found it has some wire contact problem in the middle where main line is divided in two (where "symphonized" logo is written). after moving the main line a little, both sides started to work normal. during movement it looses contact quite a lot. seems like someone has not tested them while selling.
3343804
Not the greatest design, in either hardware or software. But it works. The software interface especially can be confusing, Follow along with step by step instructions for USB sound adaptors (easily found online), the specific brand is not important because these cheap ones are all very similar. I had to uninstall and reinstall the driver a couple times to get it working right.
It successfully allowed me to send two separate audio outputs at the same time. Used with DJ software, this means you can run the live performance out of your regular audio jack, then plug your headphones into this USB sound card adaptor, where you listen to a completely different track as you sync up the tempo and beat. This works even with a tiny netbook.
4909248
The concept of building degrees of surround sound is pretty cool--nice use of bluetooth, and had the sound quality been better, it would probably be a worthwhile investment since it works with every device I have tried it with (iPhone, iPad, a few laptops). The initial setup isn't quite as straightforward as pressing a button and waiting for it to show on the other device's screen, but it's not horrible either; it just requires a little reading in the instruction book. Once paired, the devices find themselves easily and it's no longer an issue.
As for the sound, it's a little tinny and doesn't carry as far as other brands in my home (Pioneer and Bose), and considering this one isn't that much cheaper, it might be worthwhile paying the extra hundred or so dollars for one of the leading brands; however, the fact these can be paired with each other to create surround sound does make a compelling argument for buying them.
Interesting and useful product with decent but not excellent sound.
583514
The sound is really pretty good. The comfort of the earbud isn't the best, but not too bad.  The connection to my phone is a bit sketchy though, needs to be positioned the right way to have connection, but for the price, isn't bad, just need to keep the line near the phone stable and not move around a lot.  Other 2.5mm I've recently tried have had horrible connections, hence the reason this gets 4 instead of 2-3 stars.
4296658
Well the sound works, I wouldn't say that it's great.
2416068
It's fun when it works.....  I can't seem to get it to pop consistently. I have had better luck with the bass.
4843459
So I've had these for a while now.  Best thing I can say about them is that they work.

The ergonomics could use a lot of refinement.  Generally the style works well and stays put while working out or running, so the general wrap around style works out well.  The ear bud parts need some refinement though as they feel like they poke as far as possible into the ear. For me it feels as though they go too far, and the whole headset is then balance in your ear canal. Next the buttons are entirely too small to be functional.  They're tiny and along the seams in the plastic.  I think they could make bigger buttons to put on the big MPOW section that would be far more useful and tactile. You basically can't use the buttons without looking taking the item off to look and see what you're pressing. Last the audio quality is lacking any sort of bass.  I get it they're only $20, but the sound just isn't there on the low end at all.  When I use them I have to turn the EQ bass all the way up to get a semblance of low notes that usually kind of end up distorting the highs.

Wrap up.  The ergonomics need some hefty refinements, and the drivers could be better. For $20 they're alright, but I'd honestly suggest keep looking for something a little better.
2869292
The sound on this speaker bar is indeed better than that which comes out of my flat screen with rear-facing speakers. The subwoofer enriches the bass, though there is still some flatness in the upper register that makes the sound seem mildly muffled. There are two design flaws in this speaker bar that relate to its power:

1) There is no separate "on" switch to be had on the bar itself. You must turn on and off the speaker bar through the remote control.
2) The bar powers itself off after a certain period of inactivity which is not given in the documentation and I have yet to determine empirically. Because it takes 5-10 seconds to power up, the audio from the first parts of a program can be missed.

Thus, dealing with the speaker bar becomes a series of minor exercises in frustration.

UPDATE: I eventually got so frustrated with the power issues that I stopped using this bar entirely.
2879527
It works good, but it doesn't sound as loud as I expected, so, it could use some improvement on that side.
1445889
Not the worlds best sound,but it is doing what I wanted it to do. Sound is closer to me that it was.
2257713
Given the price the sound isn't bad and the isolation is pretty good too.