I don't wanna naysay anybody, but I never found music suggestion algorithms very good. Maybe it's just me, but I love Liz Phair, but I hate Alanis Morissette and Sheryl Crow, for example. So, to me it's useless. My brain recognizes quality to be a much greater criterion than similarity (and even the similarity on those is stretching it, but I get those suggestions all the time).

But if other people like it, go for it. I have tried to find new stuff using those suggestions, and sometimes it pans out.