I've got them in my hip, while a piercing has like a 80% chance of rejection these have about 40-60% :]
Most painful experience of my life, my piercer said he's not going to put them in anyone's hip after mine because it's so difficult to gta grip on the skin but he assured me that anywhere else is only as painful as a piercing
Ehhh, go to nirvana to get it done cos if it rips out, they put it back in for free!
EDIT: i am a fanny and only read the first post
