I've not used any devices, but I've read the "pee standing up" instructions before and I spent some time trying, back in my butch era. Never could get it right.

Meanwhile, both my current and my last male partner pee sitting down, feeling that it's much cleaner and more civilized. I have to say, I have noticed a big difference. When men pee standing, there's a lot of mess. You don't always notice it at first, but your toilet is *much* stinkier and cleaning the bathroom is much ickier.

IMO, we're going at it the wrong way round. It's not about teaching women to pee standing, it's about teaching men to pee sitting.