*Coke alert might be in order*
I tried it this week with the Hollister spray adhesive. This seems to be the better option, as it maintains is stickyness. I did not feel like i "needed" tape, but used some none-the-less for "back up" on the rear side of the device. I also did not feel the need for back up diapers (wore it around loading unloading gear, sitting around, driving, etc...) but again, "just in case". With the extra sticky stuff, you do need to be 'sure' of your placement. Making sure you get it 'centered' is a good thing. Though the nice thing about the spray on, is if you have to reposition, you just spray on a little more and smear it around (and don't touch your eyes, you don't want to glue them shut - just kidding!)
If you are on the slim side, I think it does kinda make you feel like you are sporting a little upwards pointing 'willy' but Heather is correct, with baggy shorts, no one would be the wiser unless you rub up against their leg or something It makes it very easy to pee standing up (say behind a tree or something) Okay, in reality, once it's applied, you actually don't have much of a choice if your pee valve is not hooked up... you kinda HAVE to stand... and learn how to aim, like... yesterday.
The hollister spray adhesive is a little, uhm, adherent come removal time, its something you want to do sloooow, and again, as Heather mentioned, site prep is a good thing.
I found wearing it "further back" worked quite well, which puts the catch part of the device further between your legs and makes sure important girl 'parts' don't end up getting kinda squished(suctioned) into the device, and remains nicely protected under the front wing of the device.
It becomes pretty much unnoticeable to this wearer almost immediately upon application. It tucks in nicely, warms up and is made out of soft, conforming latex.
with the super sticky spray on stuff, I found it easy enough to apply and comfortable enough once on that I would not hesitate to use it on pretty much any dive/day of diving.