Battery Life: OK
Screen: 4.7" screen is good. Though touch can be senseless once in a while.
Camera: 5 MP is good enough for many things.
It is slow and buggy. It takes at least 3-10 seconds for each app to start, even those which are running in the background. Also app crashes are very common ( Especially Facebook and messenger apps) . Microsoft infected the phones with something called "reboot and try again! ".very annoying.
Ms is asking for ratings all the time and its annoying after a while.
Of course, what can you expect from Microsoft and a 90€ phone ?