I purchased the Blackburn frame bag, received it yesterday. The quality is there in the material and fit and finish, Obviously have no long term experience. I found it online for about $5 under MSRP. The daisy chain goes completely around the bag so the velcro straps can be attached to clear other items that maybe mounted to the frame. Part of the reason I purchased the Blackburn bag was the expandable bottom, I don't need a full frame bag but nice to have the extra storage if needed.