Looks like you could make a better performer out of a plastic milk crate, some wire, and an old BCB tuner cap (if you can find one) and save a bit of money (about $65 and then shipping from Oz) -- but I digress (just me being snarky I guess)
But it's cool that someone is making these loops for the MW crowd, especially when the only other mass marketed one (at least that I am aware of) is the AN100. Select-a-tennas aren't made anymore.
Power to the guy making them. I hope he does well. It sounds like these antennas are good performers and tough, as well.
MW is the new SW. Enjoy it while it's still here. :-)