Bought an M5 last night. With the exception of initial installation which became hot, the phone never gets warm compared to my previous z3+ or s6. It runs as cool as my current Note 5.
Still too early to comment on the battery life. As for camera, focusing is fast but picture quality wise, it's just alright. Just not as impressive as the galaxy or note 5 camera. Cannot expect too much since it's an upper midrange phone, imo.
There's a slight stuttering when moving around pages on screen. It's not bad lag but it's there. Wifi reception is great. I'd expect that from xperia phones especially from their upper end models.. Hahaha..
Sound quality is acceptable but not outstanding in any way. A bit teeny high but loud enough. Btw, there's a firmware update ota already.
Sent from Sony E5653 using GAGT