I can't really judge on their technique recently as I have not gone there in years. I never had anything done here, but a lot of my friends who had work done there had problems with it (eyebrow ring rejected, labrette piercing infection, uneven Tattoo).
Everyone goes there because it's central and trendy, but they are very overpriced compared to other places (because of trendiness and location).
Like I said, I haven't been there in years, so maybe they've improved their standards, but i don't think these Yelp reviews are accurate. A lot of people will create fake accounts and write positive reviews to bump up their business.
I'm getting my navel re-pierced and looking at Exotix and Yonge St. Tattoos...