Excellent tool, if there are professionals in your area.
I love using thumbtack. It makes finding someone who can tackle your specific job really easy. I also like that you can see what other people thought of them. I think that keeps the contractors honest. The only problem is that some times there just arent people in your area that can/will do the job you need. I have had to cancel several job because of that. Its not the app developers fault though.
Slarty Bartfest about
Thumbtack: Hire Service Pros, v13.2