I tried getting project cost estimates from 5 different contractors through thumbtack.com. Only one responded to the request, but didn't follow through with a formal cost estimate. The others didn't respond at all, so I called them directly. None followed through on their promises/commitments to either call back or show up when promised. The review rating for one of the contractors was a 5-Star but was the single review was from the receptionist I spoke to. So, I assume thumbtack.com isn't too selective about what contractors they represent or promote. I'm quite disappointed.