I grew 3 different types last year, and this year I've noticed that there are many more varieties available. Check out the selection that Remy has at Sampleseeds.com
I found that the plants were very healthy, bushy and produced pretty well. The thing I was less impressed with was the taste of the tomatoes. I know that is very subjective, and may have been influenced by our growing conditions last year. I wouldn't hestitate to try them again.
I grow all of my tomatoes in Earthboxes. The dwarf tomatoes all grew from 2-3' in height, but were very dense/bushy. They got so heavy that my supports were all leaning over! No disease problems noted; production was good-very good. I grew: Sweet Adelaide, Chocolate Champion and one other that is escaping me right now.