Agreed, I was impressed with it! It killed me on the big picture stuff (I'm not very good) but let me win a lot of life-and-death spots where I had no right to survive. But still, it did much better than I was expecting.

The "show analysis" button seemed to suggest a lot of poor moves for me, which surprised me given how the AI didn't actually seem to do anything like that (such as playing into an eye with no chance to win).