I know the device is sold by many different companies under many different names. It is also sold at different prices, sometimes hundreds of dollars different. So if after making a decision you decide to buy, you should look around for the cheapest since they're all the exact same (unless of course you come across a maker of a new device. Otherwise, look at the pics and you'll see they're all the same.)

I also know that at least on of the sellers of the device has a forum. How censored this forum would be towards people talking negatively about the product, I don't know. It's still worth a look to see what people are saying, results, problems, etc.

Finally, you should really look into before you buy it as it may have dangers associated with it. With so many people using it, it may be limited or preventable though. So if you use it, be sure to be careful. Essentially, you're putting a noose around the crown of your penis and stretching the penis. In order for your penis not to slip out you'd have to make sure the noose is tight enough. It's likely that this will cut off blood flow which can be harmful if done for long periods (I'm not sure how long the device is worn). So be sure to watch for that.

You might want to look at this as well...

http://www.fda.gov/ora/fiars/ora_import_ia 7801.html