Here is my review from last year:
http://www.bikepacking.net/reviews/banjo-brothers-seat-bag/I had it mounted on a smaller fram 29'er with layback seat post and the bag did rub on the rear wheel. Also, the origianl rivets holding the straps for the seatpost did come out. I contacted Banjo Bros. since I live in Minneapolis and we talked about it, he took it back and reinforced it for me. Great service. For couple day trips it is great. I think I will be looking at a Revelate or similar bag of CTR in 2011.