anyone have any experience with the stickypod?

[mdwsta4]

during the summer i do lots of car photography and have been eyeing this product for well over a year just never got around to picking one up. does anyone have experience with it? which model do you have? which camera are you using? how do you like it?
i'm specifically looking at the propak model: http://stickypod.com/stickypod_propak.html

thanks!