Yes, it's not an iPad, we all get that. Stop reviewing every device as if it were.
I have an iPad, and love it to death. However, I bought the Fire because I'm a developer and I wanted to use my experience with it as a test to determine whether or not I should develop for it. My conclusion? Yes I should.
It's not perfect. Some of the hardware buttons seem like an odd choice. The back button does indeed fail sometimes, but that's it.
I think the touch works better than on any Android device I've used in the past, and I thought the mail app was just fine. Media is decent, and the Amazon Music/Video integration is awesome.
The screen size is a strange one, but I got used to it. The only thing I have really gotten used to is the weight, but I suppose that I will in time.
In short, it's not an iPad, but I didn't expect it to be.