I was wondering how effective is laser tattoo removal?

Sometimes effective: Tatoo removal with a laser may be very effective. It may take a few sessions. It isn't always 100% effective. It depends on the original tatoo colors and the depth of pigment placement.

Alot of factors: Proper lasers and a good knowledgable md are important age of the tattoo ( older harder to remove 100%) size colors all are important. I remove a lot of tattoos colored ones are difficult however I use 5 lasers! i ca remove that majority of the inks black red dark blues comeout better sky blue needs a ruby green too yellow likely will not come out and white as well.