I have not, but a good friend of mine did. It was pretty effective, but took a while to heal. It was somewhat painful, but she really wanted it gone (referred to old partner). There was some scarring. She thought it was worth it.
Apparently laser removal is the only effective way to remove tattoos. It can take several sessions depending on the size of your tattoo. I vaguely remeber hearing that it is as effective at getting red out, but that was many years ago and technology may have improved. Unfortunately I have heard that it is quite painful. They may be able to numb you before treatment. Another option you could consider is to get another tattoo to cover it up. Some artists are really amazing at cover up work. Just curious what is it that you want to have removed? If you don’t mind my asking? I have a Guns-N-Roses tattoo (No Laughing People!) I plan on having cover up work done to it. I have several artists that I am considering. I got it years ago and it has faded to the point now that it should be fairly easy to cover up with some new work which I am really happy about. :-)