Hi all - sorry it was unclear. Our trial runs are not necessarily one week. In most cases candidates have full time jobs and can't commit that much time. It's usually 2 days (over weekend) or late afternoon for a couple hours.
Post has been updated to reflect this. Most our candidates actually appreciate the personal experience and we don't just bring anybody into a trial run unless we're already mostly sure we're ready to make an offer. I think that everyone who has gone through the process thus far can speak positively on it. It isn't just a one sided street, candidates can get a sense for whether THEY will like the job, team, and culture at the company as well.
Other people have done similar things (longer timeframes even) with good success. See David w/Weebly: http://www.sequoiacap.com/grove/posts/akzj/trial-week-our-hi...