Blah. Well okay, I couldn't wait and got the 6.5 inch. It does come with an erection rod. So in that happenstance the extra inches are nice. Plus since it's hallow, it squashes, which means it doesn't make as big of a bulge as you think it would.
It does work, but it takes a lot of practice. Also you have to know your anatomy extremely well. If it's not perfect, I get linkage out of the sides and behind.
My advice, when you get it, use the faucet with a steady trickle to figure out exactly how to point the thing. It's not just positioning it correctly, it's also the angle the shaft itself is being held at. If it's held at the wrong angle, the cup is just going to overflow and wet pants will result. That's why the faucet practice comes in handy. It will help you figure these things out without going through pair of pants after pants after pants.
Personally I don't think it would ever work as well at a urinal, not because it doesn't look real enough, but because of all the repositioning and such I have to do. The placement of where I use it packing absolutely would not work when I'm using it as a STP. It's a two hand job, no matter what. It even says so on the website. There is no whipping it out and peeing. There is grabbing the balls, pulling them back between your legs so to position it perfectly. Then there is standing with your legs far apart to get the perfect angle on that shaft. Then there is praying it will work and not leak and I'm an atheist.
Honestly I'd give it a 5 out of 10. It looks good, packs well but the learning curve is crazy high and using it at a urinal is impossible. It would work well in a stall, or the woods or whatever, provided you were fast enough. I liked the medicine spoon better for a STP but having a medicine spoon between my legs all day drove me crazy.
