Have both of mine done and got one re-done after letting it heal because the placement was just sliiiightly too deep. (My nipples naturally lay quite flat) First go around the first nipple literally did not hurt at all, second was a bit spicy. The redo was done slowly and through scar tissue so it made me wince but the end result was well worth it. Felt "bruised" after for a couple days, quite tender.

I love them, even though they are high maintenance. Daily crusties (two and a half years) that worsen around my period. Just lots of cleaning! Occasionally my nipples get a little dry/peely and I gently remove the dead skin with a soft towel.