Anyone use Pinboard?

I've only just learned about Pinboard with this Delicious keruffle, but it seems like a lot of people really like it/recommend it, and it seems like the site itself is really fandom-friendly from what I've heard. I'm a little hesitant to just fork over the money for it, though.

Any experience with it? Good or bad? How does it compare to (old) Delicious and Diigo?