I'm not the previous author, but I bought my home (in SF) with Redfin about 2.5 years ago, and our experience was very good. It felt to us like all the good parts of having a real estate agent and none of the bad parts.

We wanted to just browse a webpage for homes ourselves, though (and then have someone help us evaluate and make an offer on them). If you want someone to go out and find houses and offer them to you, it's not the service for you.