My opinion about Lenovo K 3 Note after using it for a month
1) Phone does have heating issue especially when you use it on 4G, it heats up a lot while browsing net.
2) The battery back up is quite good.
3) The phone does not hang.
4) Its easily upgradable to marshmallow.
5) Camera & Display is also pretty good.
6) Plus point is that it has removable battery.
The major issue is that phone heats up a lot especially while on 4 G and while browsing it heats up to an extent that u cant immediately put it to your ears.