Pros
I am a developer in the information technology area. I have found Alliant to be a very pleasant environment to work in. We have deadlines but nothing unreasonable and there is not ridiculous pressure on developers. I feel the salary and benefits are very competitive and Alliant does a good job in making sure your salary doesn't slip below the market. I have found the people and management to be generally really great people. The company also is very flexible with your schedule.
Cons
The building itself (in Madison on Biltmore) is really bland. Everything is very grey which gives it almost a dismal feeling. The only other thing is PTO (vacation) time which they tend to be very stingy with. You only get 2 weeks of vacation for your first SEVEN YEARS of employment. That's just not enough. Fortunately, you can sometimes get credit for "professional experience" that will get your two 3 weeks a bit faster.