I've been using UXPin for about a year and a half, and while I like it, I'm concerned about the lack of updates in the product, especially given some of the gaps I see, like a decent table tool, lack of autosizing items based on text content, etc. It's also concerning that the community here isn't nearly as active as I'd expect for a tool in widespread use. 

I like UXPin better than any prototyping tool I've ever used, but I'm beginning to wonder if it's going to be something I want to keep using for the long term because it isn't being updated.