I attended Keller for my MBA, the program was pretty good. Most of the professors are in touch with what happens in the business world. It is very rare that you are learning from someone who does not have a lot of industry experience. The program is quite expensive in comparison to local programs that are subsided by the local governments, i.e. state schools. If you are looking for a pure online graduate degree and don't mind paying a premium, this is a good option.