I just called the company and got a real person first thing! No recording, no waiting, and no BS!
I was told a little bit about the company and was asked to call again after I got the unit and tried it out for a bit.
I also found out you could use the larger bladder with the 500 pack if you wanted to.
A long time ago I was a Navy Corpsman. I got assigned to Camp Pendelton and worked with and for Marines. They have a Jarhead running the program here. I like that. I think the company is going places. As soon as I get my "code" from GB, I'm placing my order.