I’ve been using this phone since 3 months now and I am really happy with this phone.desire 820 has a 13 mp primary camera which takes photo like awesome. Yes I agree that low light photos are not that good but still its quit impressive.
Now if wr talk about the performance of this device it has got a snapdragon 615 octacore processor with 64 bit system which performs very good.
This phone has some heating problem but now a days which phone does not warm up during heavy tasks.
Design of this phone is very slick and attractive and it feels very rich in our hand. So I hope this will help you to decide.