I've had the iPad mini for a couple weeks now.
I've done a lot of testing of our upcoming games on it*, watched a few videos, played other games (Angry Birds Star Wars among others), and the usual browsing and facebooking.
I still love it. It is the best portable game-playing device I've ever had. The extra size screen makes things much easier to see than on the iPhone, and the size fits my hands much better than the full size iPad.
* That's another story :)