Mine's never had a good shed (but that's because the owners I took him from didn't keep adequate humidity). I'm still waiting for his first shed under my care, hoping it's a lot better since I'm giving proper care, but I've seen many people say a "one piece" shed isn't necessarily the sole mark of a healthy snake. I'm no expert, so I'm not completely positive, this is just what I've read. Some say as long as it's a COMPLETE shed with no retaining pieces than it's nothing to worry about.. but is there is stuck shed then there may be a problem.
Like I said, I'm no expert.. just my thoughts.