Risk of problems with fraxel restore?

I'm seeing people writing about Fraxel Restore "being the worst thing I ever did". Photos of patients that have skin that looks worse than prior to treatment scares me. How common is it to have "orange peel" skin, red scabs, sagging etc? I don't understand how this could be given it's supposed to build collagen. An RN at a plastic surg. will be doing the treatments and she's done 100s of them. I've had one treatment and it turned out fine. Just worried about 6 treatments screwing up my skin.

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