I think skin full caps have their place. Mostly as emergency back ups and for quick fit and removal as you can wear them without tape or glue as they sort of mould themselves round your head. Good for going to the hairstylist to get another lace unit cut in. You just remove the skin unit when you're there without having to do any messy detachments. And of course there are no knots to worry about being seen.

Having worn a couple of skin full caps I am firmly of the view that the cons outweigh the pros. They're hot and make you sweat heaps; the injected hair lays flatter and, in my experience, falls out sooner; the edge never seems to completely disappear; they're noisy to touch; air bubbles can occur at the crown.

I haven't tried the latest very thin offerings and I'd be interested to see a review on their long term viability.