I thought I would add my two cents here. I have camped, hiked, and fished for a lot of years using various feminine urinary devices FUD. I have several Go Girls and a Freshette besides my homemade versions that are similar to a P-Style. Here is the Freshette
http://www.rei.com/product/407267/sani- ... y-directorAfter many years of use I have some definite preferences. The Go Girl is ok. The soft material it is made out of makes it discrete and easy to carry and store. But I don't like the soft material. The soft material makes it easier to mess up. I also find that I have to undress further to use it so that I don't collapse it.
The Freshette is made of stiffer material, and is very easy to use. It is a little larger and so it is harder to discretely carry etc. It is great for directing the fluids into a disposal bottle.
I have never bought a PStyle, and didn't know about them until after a friend mentioned that they were similar to what I use.
What I like the very best are the homemade versions. Basically these are made out of the side of a plastic bottle such as an empty shampoo bottle. This style of Finesse Shampoo bottle will make two FUDs using the top shoulders and down the sides. To get an idea look at the basic shape of a PStyle.

You might need a knife to start your cuts, but a pair of scissors usually work fine. Just be careful! After cutting and shaping, it is a good idea to sand the edges smooth. The sides can be straighter than the PStyle's, and I think from what I have heard the PStyle is larger than the ones I usually make.
The advantages of this style are many. It is ridged, so that it is easy to use without moving your clothing very far. No need to moon anyone!

You also don't need much tp if any. You can make it in a length to suit your individual preference and use. It is easy to direct the fluids into a container. I make mine to fit inside of a sandwich baggy diagonally. That gives me a disposable holder. It is light and fits easily into a pocket, purse, or side of a backpack.
Experiment and see what you like best. What I like best is not squatting in the woods!
Cindy