Rosemount is a little gem of a city that I very much enjoy living in. The city itself has a nice blend of affluent neighborhoods, clean public parks and a couple shopping centers with mom and pop shops. While there are public buses that you may be able to use, they only service a small part of the downtown area and having your own car will help a lot.
The best area in Rosemount is definitely the Minnesota Zoo. I've been there several times and it is a beautiful and educational institution to visit. Since it's close to Minneapolis-St Paul, you'll have a lot of options when it comes to finding a good job. Finance and healthcare are a couple of the big industries.
I also appreciate that it's relatively affordable to buy a home here in Rosemount. It's much more reasonable than the east coast prices I was accustomed to previously. Rosemount can be a good choice for people of all ages and is likely to have something for everyone.