How do you find the Quik-Pak in terms of weight over using panniers? How is it on hills (up and down)? Do you ride a DF bike? I have a recumbent (Slipstream). There seems to be a lot of resistance by some tourists against using a trailer (extra weight, rolling resistance, wind resistence, tendency to bring more gear than you need, etc.). It's always good to hear from a user, too.