I love this little toy for how quick and easy it is to use/clean compared to other sleeves. It has a few different uses, you can keep the 'shell' on and use it like a normal stroker, you can take it out of the 'shell' to spice up hand-jobs, or my favorite, is placing it around the base of the shaft and get your partner to preform oral on the top exposed part of the penis. It gives the sensation on deep throat without the stress on your partners throat!
My preference was the clear model because its fun to see the action sometimes, but I'm sure all three off a similar experience.

I used this with my partner for the intended use of the toy, during oral sex. He didn't love it, and said it was better with out it. Maybe I wasn't doing it right I don't know. :(