I really like the kindle fire, i find it very usable. I'm a heavy amazon user, and i love access to kindle lending library, prime music and videos. I like the simple interface, i'm not looking to be productive when I use this, i just want to read and listen to music mostly. I got it on sale and the value was very good.
I have a paperwhite but for cookbooks, any books with illustrations, etc, I find this much much better, plus charts and tables look better.
The negatives are battery life (just average) and of course no google apps, but I side-loaded google voice and it basically works with annoying errors. The #1 downside to the kindle is the amazon app store, and while it's not a deal breaker for me, you should check to see if apps you need are available.
Also a very pleasant bonus, these refurb units do not have the Amazon "special offers" installed which are ads on the lock screen. My unit was really like new. Shipped very quickly.