I just went to the linked website to look through it briefly. Nicely put together but very limited information, almost secretive, almost. The picture section was informative but the pricing was spotty as to what was included in the cost, which appears to be high until you find the other bits which are included for that price.
You get the 'StraightJacket' but you also get the muzzle brake attached and timed, plus they will inlet your stock for the new barrel since it's about the size of a truck axle. This brings about the discussion of which stocks will look appropriate for a barrel this diameter. Some of the factory stocks look just plain stupid due to the amount of forearm which gets removed, while the stocks with larger forearms look almost acceptable. The ARs look O.K. of course since most of the barrel is under the handguard and looks to be the diameter of a suppressor anyway.
The McMillan A5 and the Manners T2, T3, T4, T5 will all apparently look better balanced because of the wider forearm. I'm not sure about the newer PRS model though. There are others from H-S and B&C, I'm sure.
It's nice to have alternatives when the need for such arises. We can never have enough barrel makers, stock makers and accessory companies bringing new products to market for us to choose from.
Regards.