Pros
As everyone else has discussed, FAST offers competitive salary, benefits, vacation, etc... They do really well taking care of their employees and offering a decent amount of company paid-for trips and outings. If you decided to take a position here, you'll meet some great people, as I'm sure you would with any other job.
Cons
If you're like me and came from a very formal and technical CS background I would really advise against taking a position here as an Implementation Consultant. It's one of the main reasons I left the company. As others have mentioned, it isn't as much of a development role, as it more of learning there own software package and how to configure that. You won't be challenged on a day-to-day basis, which makes it very hard to do fulfilling work. I would say about 5% - 10% of your time would be coding in VB .NET and another 5% - 10% working with SQL. The rest is working with their software and changing some rows in their tables here and there, among other non-interesting tasks. In addition to that, the work mostly deals with taxes, which can be very dis-interesting and unexciting. If you were to stick with the position for a while, you would essentially lose any desirable skill set outside of this company, which can really limit your career long term. There is little to no opportunity to grow your skill set outside of VB .NET and SQL, which again, compounds to doing unfulfilling work. Long story short, if you want a career that challenges you and provides new opportunities to grow as a developer or software engineer, hold out for something else.