My roommate showed me a website the other day called woot.com. Has anyone here used the site or know of someone who has used the site?

My buddy ordered a radar detector for $20 the other day, but the FAQ for the site flat out says they don't have a phone number to contact, so if you have a problem the only way to contact them is through a message board on the site such as this one, so I'm a little hesitant to take the plunge as he has. If it is reliable, it has some great offers, so just thought I'd see if any of you are familiar with it.