I like mine; I like all the free apps, plus the "free app of the day" (even though I don't always get them), and also all the free books, both the old classics like "Pride and Prejudice" and new books that are occasionally free (on facebook and on the web, you can get Ereader News Today that has daily listings of free Kindle books; again, I don't get near all of the books that are available, most of them not being a genre I'm interested in [young adult, paranormal, horror - no thanks!], but I have downloaded some excellent and enjoyable books.
I've found the Kindle to be both a blessing and a curse -- often, I'll wake up in the middle of the night, and I *should* just roll over and go back to sleep, but if I get on the Kindle, I end up staying awake for a few hours. That's fine if I just can't sleep, and at least I can do something constructive, rather than going nuts trying to sleep; but often I think that I end up waking myself up, and keeping myself awake because of the Kindle. :-/
Two things I don't like about it -- typing on it [I'm a keyboard gal, and when the Kindle is turned sideways, the keyboard is *almost* big enough, but still too small and a little annoying to type much... and I tend to be talkative], and sometimes I've downloaded stuff (I click links, and it downloads PDFs instead of opens them in the browser), and if I don't read it **right then**, I have no idea where they're stored.
Apps my kids like include: Angry Birds, Where's My Water, Monopoly, some of the Math and Drawing games, Router, Touch Racing, Ants (smashing on the screen), and Beaver's Revenge. I have many other apps saved to the cloud to download if I or the kids want to play them, but I've actually already maxed out my space with all the free apps I've downloaded, so had to delete some from my device.
While I really like it, and I've gotten a lot of good feedback from other Fire users, not everybody likes it. One of my friends thought it would be like a mini-tablet, and was disappointed with it; it's really an "e-reader *plus*" not a "tablet *lite*".