I'm thinking of getting a Swift Crossrack and perhaps a Crossrack Bag to mount on the seatpost of my older Birdy.
http://www.xootr.com/crossrack-bike-rack.html
http://www.xootr.com/crossrack-bike-rack-bag.html
Does anyone have these and if so, how have they worked out?
I found a few positive reviews on the Crossrack but nothing on the Crossrack Bag