I won one from their site but it wasn't one of the full sized ones. It was a SIAC (Sex In A Can) which has a case that looks like a big can of beer. The sleeve material is very soft and feels nice. Both the SIAC and the normal-sized models have a cap that unscrews to adjust the suction effect while it is being used.
Do they work? Yes. They're velvety soft and have enough texture to stimulate a man to orgasm. They're really a high quality product, so that shouldn't be a factor for dismissing them.
For an average packing man, the regular-sized Fleshlights are somewhat a waste, because you never get far enough into the sleeve to reach the bulk of the internal texture. Not that they wouldn't enjoy the texture they do experience. But the SIAC products are sized-down a little which make them better for traveling and for average men.
I can't speak for women and the use of them - either by their men using it solo or by women using it on their men instead of using their hands - but I would think it wouldn't be much different than, say, you using a massage mitt while stroking your partner. But if it creeps you out, then I would say it's either not for you, or just not time for you.
There's no rush in trying new things.