I own amazon kindle fire and pretty happy with this one.
Though the price I have paid - I could have bought any amazing android tablet. But because of my love for reading I had gone for this one. Let me share my opinion for this product -
Ease of use - with easy operational menus, this makes it one easy operationable gadget.
OS - Fire OS. Little bit inspired by android but not as amazinf as android. This also limits this device to use applucation available on amazon store.
Physical appearance - mine is in black color with soft back side. Looks quite classy.
Dimentions - lil bit heavy but manageable.
Video and audio quality - I love watching videos apart from reading on this device.
Cons - limited applications on amazon store. Only front camera, non removable battery.
I would suggest if your main motive is not reading books then go for some other tablet. Else you can go for kindle fire!