Quality is pretty good but I don't like the styling or the high price. The styling sometimes looks so rugged as to be unrefined... like they walked into a tannery, grabbed the first hide off the wall and stitched it as-is.
I like a "washed" style bag, and I like an antiqued finish... but many of the il bisonte bags just look... meh. And, for the price (which is quite high) I want a lot more than "meh." Quality of the hides, stitching, etc. though are quite good so if you see a bag you really like, I doubt you'll have issues with the quality. And, it will probably age nicely; I have some friends with old bags and the patina on the leather is very nice.