Well I'm adding this new gambeson in a kelly green.
http://revival.us/index.asp?PageAction=VIEWPROD&ProdID=83
Sir Brian,
Have you already purchased this yet, or are you still just thinking about it? If you haven't purchased it, I'm going to advise against it. It has a very weird cut to it, where only certain body shapes seem to fit it right. The sloping from the neck to the shoulders is weird, and the area around the armpits is very poorly shaped. For many people its restricting.
Further, they claim its a grand assiette design, but it isn't really a very good one. A proper one will allow you to lift your arms straight up without having the rest of the garment lift, which is very important under armour. This one doesn't quite allow it perfectly, though it isn't terrible in that respect, either.
I bought one last year, and hated it. I let a couple of other people try it on, who also did not like it, so I sent it back. In my opinion, unless if you're one of the lucky few whom this fits perfectly, I don't feel that this is worth the asking price.
On the other hand, I've seen a few people post on forums who've said that they happen to fit the gambeson well enough, so if you've already purchased it, then I hope you're one of those lucky few.