Ahh, thank heavens for HN comments. I clicked the link, said "hooray! finally!" and was about to buy it in the App Store. Then I figured I'd read the comments first.
Same here. I'll stick with my xmonad Debian VM and iTerm2 - I only use tiling WM's for terminal management anyway. I've found these work pretty well with Mission Control for me.
I bought it five minutes ago and it has now been turned off. I'll stick with Size-Up.
Damned discretionary spending.
Try to get a refund if you're that displeased with it.