Good phone indeed, and very please about it. I have attached picture with my comments:
- The camera seems not to have the Optical image stabilization, or OIS and I think this why when the light is poor some pictures may not have a good quality if you move a little bit, but if you don't move the quality of the picture are very good (in my opinion), this is only when the light is not very good!
one of my typical picture with low light:
One of my picture in macro:
One of my picture with good light:
- It doesn't have the AC wifi connection but I am OK with the N (today my connection on wifi is inbound 54mbs and outband 14mbs)
- The black dark screen (when the phone is not on) only support today the date and email/text warning.
Dark screen:

Lock screen:

Tiles screen:
- you can only use the data on 1 sim (at the exception of the wifi obviously), but you can switch at any time which sim you want to use for your data
- The battery is good and can stand for 2 days in normal use, obviously if you are using your telephone non stop (as mad) I will expect the phone to hold the charge for 1 day
- Some people says that the screen is not as good as the 1520 or Iphone, yes it is not an HD screen and the resolution is a 720 X 1280. I personaly not struggling at all (my previous phone was the 1520) and I think the reading of the screen is good, see picture bellow:
- Today there is no QI charging case, but it is appear that the phone can do the QI charging.
I had the QI charging with my 1520, I have gave up because the QI charging was very very very slow, so I tam not interesting anymore about the option.
- The NFC on Windows phone is very very basic, no comparison with android.
This is what you could be consider before to buy the phone, I have attached real picture from the phone to give you some perspective.
I have owned the Lumia 520 / 1320 / 1520 but I have own also the Iphone 5S, and I personally think that the phone is a very good buy, it is a very good phone to use, the size is very good (a lot better that the 6" which was slightly to big to hold in my hand for me). The network reception is good which is mean you can call or receive call most of the time. the dual sim is an interesting option, so you don't have to take with you two phone. Windows 10 is coming up soon, this could be another interesting point.