Probably TMI time... But has anyone ever used one of these?

http://www.campmor.com/webapp/wcs/st...berId=12500226

I've seriously considered getting one. They fold up/retract, and I think they fit in a pocket/seatbag. It definitely be handy for when there are no restrooms or portapotties available (I'm not coordinated enough to squat with bike shorts and bike shoes!) -- but also I think I'd use it in porta-potties sometimes. Often I find they're set on uneven ground, and when they tilt backwards (and it seems like all of the ones on my most common routes do!), standing in bike shoes, squatting so you don't touch the seat, and all the while keeping your chamois from touching anything, in a 3x3' space, requires some interesting contortions. Would be so much easier to stand like a guy...

But the weirdness factor of carrying it around has stopped me so far ...