tell me about body hair transplants, how good are they?

It is more than possible as many people have this done. The problem is the growth cycle of body hair which is about 6 months and the telogen cycle is 6 months. That means that if you are transplanting 100 hairs, only 50 will be growing at any one time. Because of the short hair cycle, the length is limited as well as the character which comes with the body hair texture. This, in combination, makes for considerable expense when doing these, you are only getting half of what a scalp or beard donor hair transplant would give you.