I've seen this before, bookmarked it, then forgotten about it. I'm seriously looking into it now.
Sometimes I wear 1Kg ankle weights, I can walk/balance much better with them on.
This balance vest makes a lot of sense to me, I can walk much better wearing a heavy backpack, or even carrying a heavy weight in my (right) hand.
I have some money to experiment with, I may try some of these
It makes sense to me that simply lowering my centre of gravity will improve my balance considerably.
I'll trawl round a few websites and see if I can find a few wearers of the genuine article, get some pics/first-hand reports, etc.
Still haven't bought my AFO yet.