I have been using k3 note for more than 6 months.
Pros if this phone:
1.Even after using this phone for 6 months with 16 GB memory card including more than 100 installed apps, the phone does not hangs.
You can easily play high graphics games like asphalt, NFS, etc
2.the phone is very light.
3.with the new update of marshmallow, it gives all new experience to android users
4.Dolby speakers at back are great to listen.
Cons:
1.plastic body look is not that much catchy.
2.sometimes, back side of phone gets heated up.