Overall, the biggest concern I would have is housing. Like elsewhere in Montana right now, Bozeman and the area has seen housing sale prices take a huge jump, and there is not a lot of availability. Same for renting. Actually had a Bill introduced in the current legislature around the gouging people are doing for rentals, such charging a fee just to look at a place etc. So, there could be a chance that you may not get a rental, or buy a house, for some time after you start looking. Recently heard of a house going up for sale and 80 offers in 3 days. Rentals with 40 applicants in a matter of days too.
It has a pretty good population flux due to the University, and it also is a tourist attraction and jumping off point. If you like the outdoors, it can be awesome. There are tons of recreational opportunities in Montana.
Cons: the drivers and amount of traffic.