I've been here three times with a good friend of mine for emotional support as she gets tattooed. We've always been walk-ins, because to reserve an appointment you have to put down $70 or something. Even walking in to Living Canvass, we've only had to wait 30 minutes or so.
The tattoo artists are very professional here and alleviate any concerns you have about getting a tattoo. Feel free to ask all the questions you can think of! The whole shop is clean and sanitary. I like that everything is out in the open, so you can spy on other people getting their tats! I also really like the atmosphere/ambiance - lots of buddhas and very zen.
They do free touch ups for a year on any tattoo (except face, hands, and feet tatts), but you'll have to go back to your original artist.