I just had one pinned and welded to my RD701 at Rifle Dynamics and shot it this past weekend. Much less noise and concussion than the AKBC it replaced. Very happy with the results.
I also shot Jim Fuller's select fire AK47 with the Antidote installed. Not much muzzle rise in full auto, comparable to the select fire AK74 with a 4 piece Bulgarian booster.
Good stuff but low on stock. He's got 2 left as of Sunday.
If only I can talk him to making one for the 5.45...