Body hair transplant questions. Tell me about it!

[ukcali]

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I'm trying to do as much research as I can on hair transplants and obviously body hair transplants are a hot topic. Having said that I'm finding it difficult to get many answers re:body hair transplants so I've got a few questions

Firstly do they work? It sounds like the answer to everyone's prayers so I'm guessing there is a reason it's not common place. Does it have a lower success rate? Does the hair not looks as good?*
Can you simply use hair from say your legs? I've seen pictures where someone has done that but like everything with the Internet I don't know how accurate it is.*
What are the best areas to take the hair from? I've read that the beard hair seems to be a popular choice? Why, is it just because it will grow longer than say your leg hair?*
Do you need more body hair follicles than say normal head hair to create the same density?*

Basically so far my research suggests that it can be done although results are mixed. It should only be done as a last resort. Is that right? Any other advice comments would be appreciated.*