I recently managed to pick up one of these AW 2012 blazers. I will post a fit when I get the chance, but I'm very pleased with the purchase. It's 100%, medium weight wool gabardine, fully lined. The unusual fastening makes for a very interesting drape. There are three buttons, two large studs on the two layers of the "lapel" which you can see on one side in the picture, one to fasten the layers to each other, and one to fasten both to the other side of the blazer, up near the neck. Then there is another button which fastens to a tab hanging down from the opposite shoulder (also visible in the picture). You can vary the buttoning, which makes for a variety of interesting shapes. It goes really well with some very voluminous Y's for Men gabardine trousers I have, so I think I will have to pick up more very loose YYPH trousers. It would look awesome with hakamas I imagine.
Same Look 23 one I purchased in Cambon sale, I nickname it the Star Trek blazer :) Mine is size 2 and fits quite roomy for recent collections. Luckily I managed to track down the matching pants in Joyce sale in HK 8 months ago. I agree that roomy pants work equally well.