Pretty much my thinking right now.
If they had made it out of laser cut wood, then I probably would have gone for it. But cardboard? I know they claim that the cardboard is more ecological but in the end, if it just falls apart and doesn't stand the test of time it's essentially a waste.
And at that price, you're pretty close to a good wooden pinhole camera like the Ondu. And way over a good old Holga (especially with the 25% rebate Freestyle has on them these days with the coupon code).
As for the coke bottle lens, I'll probably use some Dremel diamond blades to cut the bottle.
As for the focus mount, I try and keep things ultra cheap so I'll probably end-up making something myself. I'm thinking of two sliding tubes with a string that pulls and pushes one of the tubes inside the other using a small knob or something like that.