I got some! I love them!
I'm a 34 waist at the moment. I went with their bigger size, 36-42 since there is no 34, and the smaller size is 28-32. I'm glad I did. they are tight. comfortable, but I wouldn't want to be an actual 36-42 in them.
They held 1 wetting (8 to 10 ounces) fine for walking around, but left some slight wet marks on a towel from the leg gathers when I sat. after the second wetting (another 8-10) and a couple hours of being wet, the fabric had that wet feel that cloth-like disposables get, and they left a slight mark on the towel. No wet spot, they didn't leak enough to stain jeans, but I wouldn't wear thin cotton slacks over these.
I also got the regular undies, too. I will have to try them and report back.