I now realise why everyone says they are so good. I normally wear acrylic no flare plugs (I know, they are bad for healing but I never had any reactions or anything bad happen from it) and after the o-ring kept falling off my 8mm plug at inconvenient times, I decided to get single flare, steel tunnel. It just feels so much better and comfortable!
So that's my experience, ahahaha. I feel like an idiot for not getting some sooner.