I too have heard many bad things about TyTy, and many of their claims fall into the "too good to be true" category, in my opinion.
However, I have had very good service and plants from Goin' Bananas and from GreenEarth (
Banana Trees Banana Plants). The former has the widest selection available, the plants are tissue grown, and both the service and the prices are good for what you get.
Lisa