Gen X works very well in my opinion, if your result looks like crap you are definitely missing something. I did one about half an hour ago (took me 10 mins at most) and it was near perfect. One thing you may miss is that when you apply it to Genesis you have to dial up the shape the morph was intended for as well as your transferred morph. E.g. if it's a morph for M4, dial the M4 shape in Genesis and then your Gen X morph.

If the body morph you are transferring uses dialled morphs (rather than a custom FBM) you might consider unchecking nipple and navel morphs so they are not transferred. These tend to be better done using Genesis nipple and navel morphs. In the case of nipples the transferred morphs do not always align with the texture.