I have 2 Fleshlights, the STU (Stamina Training Unit), and the Vortex. My dick is 7.5" by 5.75", for fit reference.
The Vortex fits me to a tee, and milks my dick dry EVERY time I use it.
I even posted some videos here to give you an idea. The vortex has chambers of varying diameters that mimic the feel of an expert blow job. You can slide in a few inches at a time, or go balls deep all at once, whatever you want to experience. Length doesn't really matter, neither does girth. There seems to be a happy medium for all different size cocks in the Vortex. The zig-zagging ribs inside also contribute to the texture's success. I highly recommend it as it's my current fave!
The STU, though equally great,was a bit snug for me at first and I felt I was squashing the nubs inside the sleeve. If you're thinner, it would be FANTASTIC!
However, I pulled the sleeve out and CAREFULLY began trimming the ribs on the outside of the sleeve for a more comfortable experience. The trick was to only trim a small amount of ribs at once, then try it for size and comfort. By doing this, I was able to get a more pleasing nubby-bump massage effect than the original setup. I truly fell in love with my STU after that!
The idea behind the STU is to train your cock to last longer, even inside the tightest pussy. What a fantastic idea! Kudos to the guy that came up with that particular texture.
All I know is...IT WORKS! And it works WELL! The raised nubs inside will send you over the edge fast until you learn how to work the sleeve. If you slightly turn the sleeve a little on each thrust, the nubs massage different parts of your head and shaft on each stroke, intensifying the experience, then, you get to the point when you just blow your load...explosively! There's always a next time to see if you can last longer!
As far as the Fleshlight Girls models go, you're going to pay $10 to $15 more just to have that porn star's pussy lips on the entrance. The interior texture is what gets you off, because when you're pounding a Fleshlight, you really don't much care what the pussy lips look like as much as what the interior texture does to your cock.
Unfortunately, Fleshlight hasn't yet found a way to mold the interior of the porn stars' pussies. So it's all in your mind that you're fucking a true replica of a porn star. Sorry to burst THAT bubble guys!