I have been using coolpad note 3 since a month.
Camera: Well, despite havibg a 13 mp camera, I personally found it not upto the mark. Htc’s 8mp would give a better picture. All the images captured tend to have a grainy texture. secondry camera as well inherits the same properties, and I would give both of them the same rating.( 6/10)
Battery: pretty good, hangs on throughout the day without squeaking like a girlfriend!: D( 8/10)
Display: Great, no complains about the display. Period.( 8/10)
Heating: Yes, the phone has heating issues. The temp can go upto 45° c. But the origin remains near the fingerprint sensor. So, no issues.
Ram: Excellent Ram and application management. No lag, no hang.( 8.5/10)
Speaker: average. Music quality in earphones is cool, but not great in the speakers of the phone.( 7/10)
The phone is slightly on the heavier side, but the body strength makes up for it.
Its a good phone for 9k, buy it.