Great location, quiet street, easy to park. Walkable to downtown Bozeman and all its eateries and shops.
It's an attic in-law apartment, so you're right on top of your hosts, as they make a point of reminding you in the notes they've posted inside. It's a low ceiling space, so I wouldn't recommend it for anyone over 6ft tall. The stairway up to it is very tight, so you might struggle with large luggage. The 'kitchenette' is basically a small fridge, coffeemaker, hot plate, all wedged at the bottom of the staircase with no real light, so you can't really make any food here - the hosts clearly want you to eat elsewhere. If you're planning to save money by eating in, I'd suggest another listing.
It's also a very warm space since it's above the house. It was 80 on the day I arrived, and I had to open every window in the space to cool it down, as I couldn't get the fan in the bedroom to work (after fiddling with it and the remote repeatedly.) It was a warm night and the place only really cooled down by the time I woke up. I suppose this would be a great thing in cold weather, but if you're staying in summer, it's something to be aware of.
There's a really nice deck adjoining the unit, shared with what looks like permanent tenants in the apt over the garage. You can't really use the deck after dark to hang out without disturbing them (and there wasn't any lights out there anyway, at least not thay I could find) so keep that in mind.
Truthfully this place is a value only when compared to the overpriced hotels in downtown Bozeman.