I'm not a MagPul fanboy, but this product really caught my eye; to have a DBM'd mini-chassis for under $400 is pretty exciting. I'd really like to know how much room is available in the recoil lug area. The video shows what looks to be a stock R700 in one of their stocks. I think that's the intent of this product.
The modularity really gets me: Add what you want, not what you don't, go nuts, stay plain-jane, whatever.
If anything, I'll buy one just to have one and review it. Hopefully they'll make a long action version as well.