Just got my Gear S2 Classic from T-mobile, paired with my Samsung Galaxy Note3. Am loving it already! EASY set up, easy to use, found a classier watch band (black - brown glossy crocodile skin) at local flea market for 15 bucks. Ordering a screen/body protector to keep it safe at work.
Calls route from phone to watch seamlessly, clear speaker and great microphone pick up from wrist without having to keep wrist near face!
Brilliant display! Great battery life so far while blue tooth connected. Have yet to try standalone for extended time, but call forwarding connected fine.
Fun and easy to switch faces. So far happy with native apps.
Only disappointment was having to revert to basic android sms instead of using my preferred Go Sms app. Will contact Go folks to see if they have a Gear app in the works.
Receives sms pix just fine. Used on board music player for loaded music whole working around house and in garage. Will be trying it (and battery life) while at work tonight.
Have not tried blue tooth from watch to headset yet.
All in all, am happy with Gear S2 Classic straight out of the box!