Well, mine arrived today, here's my initial thoughts.
What this actually appears to be is a suspension harness. The leather straps have rings built in to take the ropes at regular intervals, with the holes on the straps stopping too short for them to be done up tight as restraints. So the first thing you'll need to do is drill some extra holes in the straps.
Once this is done, this is actually quite a fun and challenging escape. I won't go into too much detail about the method here (PM if you want to discuss it), but it looks physical, with plenty of opportunities for thrashing around and revealing reaching hands. It took me 5-10 minutes to work my way out initially, this time is obviously dropping the more I practice with it.
The key part of the escape is working the zipper down as the straps are released; without gimmicking, the zipper won't budge if manipulated from inside. I am wondering if this fact will be clear to the audience; there is obvious effort going into the escape in its ungimmicked state and my housemate seemed sold, but I'm not so sure if an audience will buy into such a familiar thing as a zip as a useful restraint device. I'm hoping to try the escape out in open mic next week, so I'll be able to guage reaction to it then.
In terms of build quality; good, tough leather straps, but while the lightweight canvas as a whole is strong enough to hold there is a problem with individual studs working their way through. One of the strap loops around the chest area came loose on my second escape attempt (when, in fairness, I was subjecting the strap to a lot more tension and violence than it would have had from the intended use, though it's still worrying), so I had to repair and reinforce those parts. The thing was cheap, so there is an element of get what you pay for. With a bit of jerrying, though, there's definitely a useful, presentable piece of escape apparatus there. And it does look nicely intimidating with it's black canvas and shiny leather straps.