I have one, had it done when I was young and invincible. It's only small (size of a 50p), is a plain black one (no chinese writing or disney characters) and is in a place that can be hidden.
It was very expensive at the time for its size (£50) but it was done by a very good, reputable artist (probably the most famous/well known place in manchester), I would never have had it done by some iffy back street place. Mainly for the hygiene/infection reasons but also if they botch it you have to live with a boss eyed piglet forever and a day, not good.
I was happy with it for years (I've had it for 13yrs) but in the last 2/3 the edges have started to spread a little and my thoughts are turning to removal. I've spoken to a few professionals about it and it seems that my best option is surgical - basically cutting it out, which will leave a hairline scar around the edges of the cuts, but is a one stop shop. No lazers that take a looooong time and many expensive return trips and quite a lot discomfort.
To honest, if I knew then what I know now, I wouldn't have had it done. That said, I am very glad that I had a sensible head on my shoulders and went for a personal, non-tacky design that hasn't dated. I've just decided that it's time for mine to go, though they're permanent they don't age well (spread and blur). It's not a design where I can get the edges redone to redefine them, so that's not an option.