I had one bad experience with it. But that is also because my heart was involved. I had been denied playing with myself for a period of 24 hours. However, something came up and he could not take care of me as was planned. The following two days I had absolutely no sex drive because I was so disappointed. Anticipation burn out, I think.

Other than that, I love a bit of it. Nothing too extended. I wouldn't want to deal with me if I had to go too long without an orgasm.