Let's see.... First one I tried was the packer with the go girl funnel in it. The funnel part is wayyyy to flimsy for me to be successful with while clothed. Spilled/leaked every time I tried. Next I tried the gen 2 Peecock. Had a bit more success with this one but the silicone still seemed too flimsy to create a proper seal every time. Lately I've been trying to get the hang of the Number One Laboratories Model D. I've been successful with no leaks a few times, but the reservoir size is pretty small. So you can't just let loose and keep peeing till you're done, you have to pee and let it drain then repeat. I'm hoping with more practice I'll be more successful with this one. Other than those three, the pStyle works 100% for me. I broke a bit of the end off so it's smaller for carrying. Also easy to wipe with the hard edge and not have to worry about feeling wet. If only it were compatible with a packer!