I bought this pen to tattoo my rabbits, as my rabbit tattoo pen gave out after only 1 summer. :-(PROS:Easy to use: was able to start right away, no need for extensive trainingVariable: Able to change depth of needle and speeds with easeQuick: changing needle cartridge is super fast and easy, no need to go over lines multiple timesLightweight: was able to use it all day without fatiguePowerful: Able to tattoo thick skin with easeSolid durable construction: Outside shells is metal, dropped it once, kept running like a top3 different speeds: I mostly used the fast speed, but I love having the option of slower speedsEasy to clean: since it has a metal casing, I wiped mine down with alcohol, which helps remove excess ink andmakes clean up a breezeVery cost effective: If you want a decent tattoo pen without the major cost, this is a great option for anyonewho needs a great tattoo pen without the cost of more elaborate modelsCONS:Needle cartridge refills: each needle is approximately a dollar (box of ten for $9.99), so if you change yourneedles frequently it could get a little costlyPlug in: must plug into an outlet. I chose this version, not only is it cheaper, but I like the fact I won't havepower issues affecting the quality of my lines. They do however have a version that is cordlessand stores a charge for those who don't want to deal with plugging into an outlet. Be awarethough that the cordless version comes at a higher price.