Yup, been using it for a few months, and have purchased the unlocker to support Tolriq, he's done a fantastic job with it.
I have it configured with 4 of my XBMC devices (server, living room, kitchen, bedroom) which share a central MySQL database, using the "shared database" option so that it only synchronises the data to Yatse once.
Nice and simple to use, the call notification plugin is great, so if my mobile or my GF's mobile rings when we're watching something, it'll show who's calling and pause the video/music, and automatically unpause it when the call ends.