As someone who used to work at M:S, I say DON'T DO IT! I was initially thrilled at getting that attraction as it's one of my favorite rides...but I was pretty miserable working there. I hate to say it, but most of the workers there really aren't all that nice...maybe it was worse for me because I was in the CP and full-timers aren't thrilled with us taking from their hours, but I tried to make friends with my co-workers and very few of them were friendly to me.
It's great when you see the guests off that thought it was awesome, but you frequently have to deal with crying terrified children who's parents forced them onto the intense version, as well as guests who become sick during the attraction. Of course there are more guests who get off happy than sick, just warning you that it does happen.
I'm a huge Disney freak, but I really didn't enjoy working this attraction. The guest problems weren't too big of an issue, for the most part I loved working with the guests and trying to make their vacation more magical. But co-workers can make all the difference...and they were pretty awful. Particularly my trainer, who frequently made very offensive and off-color remarks. I didn't feel very safe working there either. There was one incident my second day working there where someone locked me in the ride chamber and luckily realized it before starting the ride, because otherwise I would of been struck by (and most likely killed by, considering their speed) the ride vehicles.
Hate to be the downer, I love Disney...but I had to say something since I guess I'm the only one here who has ever worked there.