I really like Matt and Nat, but I think they're becoming really overpriced for a faux leather bag. I bought an awesome messenger bag from them a few years ago to use for school (it looked like an envelope) and I thought it was a bit steep at $100. But it lasted really well (although the color rubbed off on my good coat....). But I can't really justify spending $200+ on a fake leather bag, when I can get a real leather one for the same price.
But if you don't believe in wearing leather, then they're a great idea!
i think some of the messenger designers are quite good. however, they are in no way eco-conscious since they will take thousands of years to break down in a landfill after being thrown away. (leather takes 50 years to break down completely in a landfill)
so, i think its a bit of a faustian bargain purchasing them. also their website clearly tries to hide that a lot of the bags are made out of PVC (they only mention that the interior is made out of recycled plastic bottles).
i think the designers meant well in offering items to vegans, but i think their website needs to be more clear.