I just tested the phone whole day yesterday.. cant take any pics and decided not to get 1 yet..
The camera, not expected, kinda noisy so will wait for later firmware to release 1st.
The sound still same like k810 like tat.. loud enough for me and the sound still okla..
The buttons are..

hard to say this but need time to get used to it. maybe after 2-3 days is ok with it already and the 3 touch sensitive buttons are quite sensitive, accidentally press till several times.
The screen is sharp and clear, love it very much.
The bottom battery slide to open type is always the coolest part, totally like digicam for how u open the lid, change battery, insert memory card and so on.
The camera module is built it in the middle of the phone at the back so have to take time to get use to it, coz normal phone camera normally placed at the top part. So sumtimes ur finger tend to get in the way when take vertical pictures.(maybe im not skilled enough gua)
The blue LED ring is nice, every eye catching..
Tested both M2 and MicroSD and both works perfectly weel, so its an advantage upgrade for MicroSD users.
The themes and so on quite normal, nth to be anything to shut about. The stock mp3 player is good enough for normal listening tho.
Thats all i tested la..