As a user of this phone for 1 year and a user of many high end smart phone, I can tell this was the best phone I have ever used.
Pros are too many like
Best Processor(Snapdragon 800) with 2 GB DDR3 RAM enough for almost all day today work.
Light Weight
Screen is awesome
3000 MaH battery
NFC,
13 Mp Camera
Quick Charging but it was not mentioned in the specification .
and much more
For the cons part
The Design was some what on the down as it was flat so handling was some what difficult with sharp edges as my hands are small, for big handed person it shouldnt be a problem.
My experience with the mobile was very good until one day is dropped off my hand and display was broken due to that. But that was ok as it had already taken dozens of falls already. But still a disappointment when it breaks. For the record I was also not using any cover or case, so I will recommend a case immediately if you dont have one.
Apart from that it was a good mobile plus the miui is the best thing you can get, I was able to do high customization with apps and their permissions very easily, The UI was also smooth and nice.
Plus you can also ROOT your phone without losing its warranty as other company policies.
All in all it was a nice experience with the Unit.