Have handled one of these and I can tell you what he says in the video is 100% true. It's a PITA to load (you WILL cut your fingers up - did you notice the gloves?) and you feel like you're breaking the gun in half to try to cycle that lever. I expected the copy to be "old-style" with all of the rough edges smoothed out by modern manufacturing and new metallurgy - no such luck. These guns are as rough as 1887 was, and other an being 12 gauge, there is NO updating at all, good or bad.
They get an A- for authenticity (the "-" for change to 12 ga) but the rest of the gun is C grade at best. If you are considering buying one for CASS or you just like older guns, try it at your LGS or gun show before shelling out the cash.
(Anyone catch that pun? "Shelling" out cash - shotgun shell...I crack me up!)