Frio insulin cooling case, anyone here tried one?

I have heard many many people say that the Frio insulin cooling cases work amazingly well.  I evem read someone in a group on facebook say they went to Australia camping with one!  Has anyone here used one?  I tell people about them all the time, yet never used one because I haven't needed to as of yet.  I just keep my open bottle of insulin in my dia-junk bag in my purse.  If I was going to a really hot or cold climate I suppose would need to get one. 

Any way, in case no one you have heard of them or need something like this, here is their website! 

http://www.frioinsulincoolingcase.com/