"6cf is pointless"
That comment is exactly what I'm talking about, but I do appreciate your opinion.
I've researched it, I'VE TESTED IT, and for the type of diving I was doing and the ease of transport for travel in my carry-on the 6 cu ft. fit the bill exactly. It may not be for you, or for everyone, but to say a 6 cu ft. is pointless is a poor blanket statement.
As a new diver, and reading comments like yours, I was concerned about a 6 cu ft. not being big enough for what I wanted to use it for, so I tested it. Turns out - it works great for what I wanted it to do. So the moral of the story is - Test it for yourself and don't believe everything you read.