I have a full back peice ("Tree of My Life") that goes from my neck down across my buttocks. The spine... not so bad. Behind the ribs... felt like talking through a fan. Over my sciatica nerve... most intense pain of my life. It felt like my legs were splashed with acid or boiling oil. Almost 20 hours of work and 2k spent and I wanted to end it right there, just stop and go home. I'm glad I didn't, but it hurt so bad. At least I know that when I get my 3/4 sleeves it won't be as bad. 
