I bought mine about a week ago and I like it so far. Looks like there are a few issues that I pointed out on a few forums and the Samsung review the day after buying it. Some have been addressed, others I guess I'll have to wait for a software update. The battery life is good, functionality is friendly for the most part, taking calls from the watch is easy and people on the other end can't tell I'm using the Neo (just make sure you're in a quiet place to hear the other person. Media controller is cool and works pretty seamlessly with the stock loaded music player on your phone, I've tried it with PowerAmp and it's a bit quirky. Here are my gripes....
-Out of the box, good luck getting the weather app to update when you click the refresh button. Looks like this bug was fixed with the Gear Manager update.
-Out of the box, you have a laundry list of apps where you can receive notifications. After the update, that list is significantly smaller and some that I used before the update are gone such as GMAIL, WhatsAPP, and K-9 Mail. Not sure why they got rid of 3rd party app notifications, but they need to bring it back.
-If you are dead set on using S Health and the pedometer feature, use it on the Gear rather than on your phone. Neither are very accurate, because all it tracks is physical movement and not steps. I shook my s5 and it registered 9 steps....
-S Voice seems to work pretty well when responding to text messages, I have yet to have any problems with that feature. I just typically wouldn't use it if I'm out in public or in an area with noise. It only works with the stock messenger app, which I hate because it looks too cookie cutter.
-They need to allow you to customize icon colors, rather than just the clock color.
-Lastly, the gallery....why is it even available on the Neo if you can't upload images?? They give you the option of uploading music, but you can't upload images rendering the gallery completely useless.