Maybe you wanna have a look at this. One user suggested that a new device often lacks sound quality and needs to be used for a while to reach its quality (which can be accelerated by playing pink noise).
Some users reported that it is difficult to take off the screen the first time, but then it becomes easier. There are also tutorials available that show how it can be done easily (see first post in that thread)
[quote=“eqfive, post:164, topic:11491”]
The camera quality [is] not convincing
[/quote].
Basically I agree. Though I also have to say that so far no smartphone camera has convinced me, and I am still very often carrying a decent camera with me. Indeed some phones have a slightly better camera installed, but still I never experienced a convincing phone camera yet.
I am looking forward for the FP-OSOS, which should be either easy to root or come rooted. It is rumored that this should happen in the first quarter of 2016 
[quote=“pwiegers, post:165, topic:11491”]
The backcover is very slippery. It is plastic, but not rubbery. For me, it could be more sticky.
[/quote] Personally I think it gives more grip than most other phones I’ve had in my hands.
[quote=“pwiegers, post:165, topic:11491”]
The proximity-sensor does not always work
[/quote]Did you take off the display protection cover? I heard some people say this problem disappeared after removing it. I never experienced any problems so far (I took the cover off immediately).
This was my fear when I saw th specs. Less than 2500 mAh on a 5 inch screen didn’t seem a lot; and it also proofed to not be a lot. With my usage pattern I hardly get though the day. So far the biggest disappointment for me. I had to buy a Powerbank now, so I can use the phone also during long travels (since I also use it as a work phone; hence I am grateful for the Dual-SIM functionality). So in terms of sustainability, A bigger battery would have prevented me (and maybe also others) from getting an extra battery or powerbank.
The size is rather a consequence of the modularity of the phone than because of a big battery. And of course due to the (for my taste over-dimensioned) display size.
[quote=“pwiegers, post:165, topic:11491”]
But you must actually hold the button while shooting video.
[/quote] I trigger the camera shutter on the screen, not with the button. This way there is no need to hold any button while shooting a video.