Excellent -- worth the 20 bucks.
While Im only a club level player (5k), Ive begun taking the game more seriously. Since I play on KGS, I typically use cgoban3 to review my SGF games locally, make edits, etc. Since KGS doesnt have an iPhone app, I have been using my IGS/Pandanet account. I wanted a way to review these games on my phone, and this was the literally the only app available in AppStore that offered this functionality. I decided to take a chance and spend the $20. Im not at all disappointed; clearly a lot of work went into this app, and it does everything I hoped as well as having some extras that are nice..... such as tsumego, annotated games, and an impressive library of pro games.
If you play go seriously -- or even casually, but with the hope of getting better -- this is an awesome study tool for your mobile device. The ONLY thing I wish it had is a score estimator. It guesses territory, but not score. Still, its a great app, and in English rather than Japanese. Thanks guys.
Dennola4 about
SmartGo Kifu, v4.2