TubePress is feature rich and robust. I'm very new to it though. I have spent an afternoon integrating it into my development site. I do like it. The CSS it is easily customizable. One problem though is on my development site it consistently timed out every other refresh. A little concerning. I even had caching on. Why would it timeout if it was really cached?
Update: I am now using this on my live site. I have not experienced any timeouts thus far. Working like a charm. 4 stars.