I have a Rikon 12" which is similar to the Jet in terms of size and power and it handles bowls smaller than 6" pretty well. It struggles at 8" and the only 10" I've turned worked it way too hard imo. If you plan on 6" and smaller it should fit your needs.
I spent the last two weekends demonstrating turning on a Jet 1221vs.
8" bowls are no problem at all using blanks that are nicely round and in balance.
For green (fresh cut, wet) wood blanks, or if you are making natural-edge (bark-edge, live-edge) bowls, 8" is about the limit, and use the Low speed setting for the drive belt so you get decent torque at low revs.