I have been involved with imFORZA for over a year and my experience with them has been nothing but exceptional. They were more than willing to help in anyway possible and extended themselves beyond what we contracted for.
Their services are prompt and the techs are easily reached for questions or comments. Furthermore, they were realistic about the visibility they could create, page ranking and the time it would take, i.e., no over-sale.
If you are in need of a great SEO company I highly recommend these guys.