I was a very hairy guy. It still weirds me out when guys get turned on by it.
Spent $6K at "American Laser Centers". I can't argue with the results almost 9 years later. But, eventually it will return. On that first visit, I think I ran them out of instant ice packs. Being fair-skinned, they had to reduce the power...then its less effective.
If I could travel back in time, I would instead invest in personal training, getting orthodontics, and just having someone shave my back periodically.
I would research to make sure IPL is the right method. http://en.wikipedia.org/wiki/Laser_hair_removal