I had mine done in the left eyebrow.
Was surprisingly painless - only hurt when I caught it on shirts and clothing.
It has grown out now though, but, in my opinion, that was because I got it at 16 and my body was still growing. It was getting nearer and nearer to the surface of the skin, so I just took it out as I didn't want a hole in my face. Looks fine now, you wouldn't know I had ever had one if I hadn't told you
It also produced the largest amount of pus I have ever squeezed out of any part of my body
(was the most enjoyable and rather amusing experience too!)
It didn't get infected and I gave it a little squeeze once a day to keep it clean (and used the surgical cleanser stuff you can get).
I quite miss it if I'm honest.