Works great, once you can get it paired
590388
I have been trying to get a Bluetooth connection from my computer to a soundbar. I tried numerous USB Bluetooth dongles and all of them seemed to work - at first. They, the crackling and popping started! It was driving me nuts! I came to the conclusion it was something with the computer, as my phone would connect to the soundbar no problem. I saw this on Amazon and figured I'd give it a try. The instructions don't seem to be correct - I couldn't get it to pair unless I held down the power button for longer than 3 seconds, then it paired right up! That's why I didn't give it 5 stars. Also, it does seem to work just fine while it is charging. Audio sounds great!
4822954
Third edit, updated for considerable effort, but with company assistance.

The speaker is great on its face.  I only removed a star due to the relatively difficult set-up for the wireless capability.  Once it is finally set up it works - but only to the extent that you have a solid wireless presence.  Otherwise, you will experience many drop outs.  That itself is not a fault of the unit; that's every wifi speaker.  The bluetooth works well if the supplying device works.  From an iPhone/IOS, it works great.  From a MacBook, not so much - again, a problem with something outside of the M3 speaker.  For some reason, Apple can't get Bluetooth to work properly on the later revisions of the Mac OS.  A Google search on this topic will reveal numerous questions and potential solutions, none of which work entirely.  Bluetooth is lossy.  I have not tried the AUX in option, but I would expect it to work flawlessly.

There are no controls on this speaker, as normal for a Bluetooth speaker.  I've found that the optimal (for me) sound required using the equalizer in iTunes to shape the profile to my liking, drawing down on both the bass and the treble.  I suspect that the M3's profile is similar to that of headphones, a V.  Thus to equalize it requires an inverted V on the equalizer profile.  As long as your device has a means to control the signal, there is no detriment to a lack of controls on the M3.

There are cheaper Bluetooth speakers, but very few cheaper ones that have wifi.  And there are astronomically expensive ones.  This is a good entry point into a wireless speaker that has PLENTY of output.

EDITED:  Ignore the appropriate portions above.  The speaker sounds great when it works.  It drops out every single day on the wifi configuration.  I get to listen to a lot of silence while waiting for it to kick back in.  Now is one of those times.

EDITED (2nd):  The wifi setup works fine on IOS with the GGMM application from the IOS app store.  It doesn't drop out, even when connected to the same home network.  Whether this is an Apple or a GGMM problem, I cannot say.  I can say that it works 100% on an iPhone and intermittently on a Mac.  Sadly, I wanted to use the Mac.  Using IOS greatly limits the equalization capability, since it doesn't allow for a configurable EQ curve. (Nor will the 3rd party apps work with Apple Music streaming.)  For me, on IOS, the best EQ option is "Vocal Booster", since that seems to be an inverted V, cancelling the inherent V of the M3.

EDITED (3rd):  This company and the M3 is struggling with the vagaries of a wide range of networking options found in people's homes, including mine.  I believe we (the help desk and I) have got mine at a reasonable state of repeatable function.  The technician/engineer spent over an hour with me on the phone, along with numerous emails.  Together we came up with a router configuration that seemed to work.  If it stays stable, all is good.  Setting up wifi sound appears not to be a turnkey operation.  I have no experience with other devices; this was painful, but it can be made to work.  I feel confident that GGMM will expand its experience base so that subsequent customers can be more easily guided through the process.  +1 star for the company's commitment.
191858
Pros: Works as advertised. Sound quality is good. Reliable thus far.

Cons: hard to pair. Sometimes you have to keep trying for 15 min at a time. Best method is to do it without any other electronics in the room, as those may cause interference.
1721770
As a record player, it functions very well.  It's also very beautiful.  Setup was easy, pairing with a bose bluetooth speaker was easy, and the sound is fantastic.

However, this thing occasionally refuses to pair with the speaker.  The speaker itself has had no issues pairing with many other devices in the household.  I haven't found a fix yet or a reason as to why this happens.  It's not a consistent problem, but when it happens it's very frustrating. I will likely be purchasing wired speakers in the near future as it's a hassle for easy listening when the speaker takes 3-5 attempts to pair with the device.  Seems like I'm not alone in that respect.  In this case it may be best to just do things the old-fashioned way!
3137098
Harmony works as advertised, and is very useful once you get it working properly. However, some adjustments can be very frustrating to set up, and some very basic activities (such as pairing bluetooth on a PS3) can be almost impossible to figure out... The whole interface is very cryptic and slow to respond during editing.
If you persist and get past these obstacles, the end results are very good.
2934461
After trying for 25 times it finally connected. It will do for now.
4061240
We have had some problems with connecting to Bluetooth but it eventually works, just have to try connecting several times.
4652601
Just got it. So far so good, but here's an FYI about pairing it.

1. Turn off MT103 by pressing and holding the MFP button (circle button) until red led flashes and stops
2. Turn MT103 back on by pressing and holding the MFP button until both Red and Blue LEDs flash (don't stop holding when just blue LED flashes)
3. When you see both Red and Blue LEDs flash, let go and the Blue LED will start flashing rapidly for a minute or so (it's now discover-able)
3. Set your phone/tab/etc to search for new devices

I only give 4 stars because even though the instructions say to wait for both Red and Blue LEDs to flash, it doesn't mention that Blue LED will start flashing rapidly before Red and Blue, and the instructions say when blue is flashing the MT103 is discover-able.

Other than that, sounds good so far. I'll update review after a little while of use.

In summary, when you go to pair this device, make sure you hold the button long enough for both the Red and Blue LEDs to flash, let go, and then Blue will flash rapidly meaning its ready to pair.

...Update...

I'm still impressed with the device after using it for a week.  My only complaint, and reason I'm leaving my rating at 4 stars, is that the headphones that come with it have poor sound quality.  If you plan on listening to anything with bass then plug better headphones in to it.  I have Beats by Dre Studio headphones, but I've always hated that they were wired. Now they are wireless thanks to this device!
2594036
If you can get the product to pair with your smart phone it works great. It took three tries of at least 20 minutes (once I waited an hour) to get the device to pair with my iPhone 5 but once it paired I had no trouble each subsequent ride. I recently was given an upgrade to an iPhone 5s and after three tries I still haven't successfully paired it. I bought it because I wanted something not too fancy that would work and not break the bank. I recommend paying a little more and buy something that works the first time do you aren't hanging around waiting for it to pair before you can ride.
23017
Works great automatically pairs. Just wish it had a power switch.
4401574
works great, responds quickly (turn on when call is coming). i am having issues keeping it paired to my phone at times, but that may be my phone's fault...or mine
3185638
Haf to try multiple times before I was able to get this to pair with my phone. once I did it shortly disconnected and I had to try it multiple times again to get it connected. Went through this whole process three times before deciding to return it
1561682
I struggled with pairing my HTC Wildfire to the bluetooth but persistence paid off. There's just one stage that isn't made clear in the process.  YOU MUST PRESS THE ROUND BUTTON TO GET IT TO ACCEPT! Having had about ten goes at pairing it I finally stumbled on the final part of the pairing process. The sound is great, the separate microphone is great.  The HTC media player works well, but you'd really want a dash mounted larger device to take full advantage of this free feature. The coloured display is a bit OTT but i haven't sussed how to calm it down but it's just a bit more time fiddling with it. It picks up loads of stations too, much better at this than any other radio I've used. Good bit of kit at a good price.
4675791
Initially I was going to rate this 1 star.  It was hideously difficult to pair to my Sony wireless headphones.  I guess I finally held my mouth right because the thing finally paired.  And it stays paired.  The first thing I did was go back and forth several times between connecting my headphones to my TV (to which the device is connected) and my smart phone.  No problem.  I have it connected to the RCA out connectors of my cable box. The volume was just fine and very good connection even in another room.  Some have talked about poor battery life.  I don't know.  I just leave it connected to wall current through a USB adapter and it shouldn't be an issue.
167218
I'm currently using this device to provide a direct ethernet connection to my Roku video player, as it seemed to be having difficulty with a wifi connection.

I'll make this review short and sweet.  It's supposed to be plug and play, but I couldn't get the 2 remote units to communicate with each other.  I probably spent well over an hour on the phone with tech support and while they were nice, they didn't help me much.

Finally, I rebooted and reset everything under the sun including the cable modem, router and each respective device and after multiple attempts I *finally* got the thing to work.  Total setup time for me was over 2 hours.

Not saying that you'll have the troubles that I had, as I'm sure many people plug them in and they work perfectly.  But that wasn't my experience.

The good news is that once I got the devices properly linked, they seemed to work together seamlessly and flawlessly.  So I'm giving this product a 4 star rating because it does exactly what it says that it will.  Be aware though that your setup experience might be pleasant and easy, or not so easy.
500217
It took a bit to connect it to my phone but the head set works great. For those in need of help pairing. Make sure the head set is off and your phone is ready for pairing. Then hold the play pause down till the blue light turns red and blue then search for bluetooths on phone . it took maybe 25 to 40 sec. Enjoy
2119129
Paired to my phone fine the first 3-4 times, but since then - nothing.  Have tried re-pairing the device, using a different phone altogether, nothing seems to work.  When I was able to connect to it, it seemed to connect to my car's ECU okay and updated about once a second.