Rngr, ADS = All Day Stretch. It just so happens that the product at the site you linked is for an ADS device.
As far as that product goes, if you have money to burn then give it a try. I would have trouble forking over 250 bucks for something that could be made for 10 bucks or so. About the only thing there that looked interesting was the rubber ‘condom’ thing they put on there initially, but again for 50 bucks just for a single one of those? I will pass.
Do some searches for ads here and read up, you will find many different options, if you have a pair of scissors you can make a captns wench with the right material. If you have a hand held drill you could make a homemade penimaster. There is also golf weights for ads, and you will likely find a few more.
If you buy one of their kits, report back what you think.
Nem