I haven't worked for them, but I did just turn down an opportunity to work for them.
My reasons:
1. I need a permanent position, they could not guarantee me that this would be steady work.
2. I live 5 hours from the actual office, and they wanted me to come there 2 times, once for an actual interview and again for 5 days of training, and would not reimburse for travel or lodging at all.
3. It's the Medicare Advantage program, and if and when the Healthcare Reform passes, I have been told that is the first program that is going to be cut (the Medicare HMO's)...I asked about this and was told that is why they cannot guarantee steady employment.
The upsides: they do provide you with a laptop computer, and you can work from home once your week of training is completed.
Not saying you shouldn't do it, this may be perfect for you. I just wanted to give you my input so you have some food for thought.
Good luck!
~P