In some aspects it should be calles a flagship.These aspects are:
1 metallic unibody confirms durability
2 gorgious looks
3 dynamic and vibrant 2k display having good viewing angles
4 fast and furious snapdragon 810 processor with 4gb ram conforming no lag
5 memory can be upto 156gb 128+ 32
6 gorgious camera having pro mode
Aspects in which it should not be called a flagship
1 no use of fingerprint sensor it can be bypassed easily
2 lots of bugs in cynogen mode because of this phone has no worth of it
3 Sometimes wifi wont work