I like Android Marshmallow a lot and I like that Wave8 does not add anything to it. It has the vanilla android. WV8-M HD+ has a quad core A17 processor, a 2 GB RAM and a 12 GB storage. I would like it more if it has at least 4 GB RAM for multi tasking. I have delay issues in launching apps. I have lags in click / swipe responses. The battery is fine.
The front camera is 2 MP and the back camera is 8 MP. I have not used it extensively but so far it takes excellent pictures.