Pros
Good pay and benefits. A great company culture with little politics and bureaucracy. Fast supplies a great product, and it's nice to work on projects that are successful, exceeding customer expectations. There is a most expenses paid trip for the entire family to a resort for the annual conference. These conferences are always really well done and tons of fun. For example, last year they flew us to Orlando and had Harry Potter Land opened in Universal studios just for us.
Cons
Fast discourages continuing education. You will get some great experience working on projects and as long as you are good you'll quickly be given more responsibility. However, don't count on being able to pursue graduate education or certificates. I could see getting stuck at Fast without having credentials that could translate to another company. Moving is an absolute requirement for most positions. Fast pays for a moving company and gives some extra money to help, but every time you move it will cost you money out of pocket as well as several vacation days. You will never be able to buy and keep a house long enough to gain much equity. These things should be taken into account when comparing salary to other companies. You need to make more with Fast for an equivalent standard of living. Assuming you don't work in the development center in Denver, Fast works in the client offices which are usually state governments. This means that you'll never work in a nice office with good equipment. Plan on working in a grey cube with sub standard hardware