We have used this company to install floor tile at our home in 2011 and 2013. Scott Huss, the owner, is a licensed contractor with no complaints with the Arizona Registrar of Contractors. I believe in using licensed contractors whenever possible.
He does excellent work in a very professional manner.
FYU, the website for the Arizona Registrar of Contractors- a state agency- is http://www.azroc.gov/
You should check the license status of every contractor you might use. Some people claiming to be "licensed" are not.