I recently used Homejoy to clean up an apartment after a tenant had moved out and left it in a mess.
Katty cleaned the apartment while I was out -- I told building security to let her in. I went in to see the results today and I was blown away. In about 2 hours she had completely transformed the place. Cleaned the hardwood floor (w/o ammonia as instructed) and cleaned the walls from the mess they were.
I'm very happy with the service and intend to use it for my own place.