Agree with Anthony: responsive and clean. Does everything as expected.
Snappy, useful, navigate/control and features similar to ion3, but written completely in python, which is easier for me to decipher. A little trouble rendering java swing guis, it seems, but otherwise, I dig it. Essentially, this IS how a window manager should be: light, fast, free of bloat, thus, useful. 1.5 thumbs up! Just, needs documentation, more than anything.