It works well as an STP, it's pretty easy to use. As for packing, it's not the best. It's extremely stiff, so if it gets displaced it tends to look like a boner, and if anyone happens to touch you you will feel rock hard. You pretty much have to fold it to pack with it.
They also have a harness that is apparently designed to work with it. It helps position it perfectly for peeing, but tends to be uncomfortable for packing.
Overall I like it and would recommend it, unless anything I mentioned is a huge dealbreaker for you personally.