This is the company my HOA (www.yelp.com/biz/gerson-realty-and-management-tempe) sent to my unit to clear a clogged pipe. All Star said the clog was inside the unit and wasn't the HOA's problem.
This is a link to my review on the company my home warranty company sent: http://www.yelp.com/biz/economic-plumbing-professionals-llc-phoenix#hrid:0y2zP6Wx4dBNfKRiHDRmAw
I'll give more stars to the first company who can be honest and fix the clog without pointing fingers.