Without getting into the whole rigid vs softail thing, my OL swears that the 2up seat and sissy bar really help on longer trips. We did about 300 miles last Saturday and she was a little stiff but much better than she did on the stick on p-pad. If you want to play with the idea of gel or air for her you can find small pads of both at places like medical supply stores for her to try out. That way when you do get your seat redone you know what to add. Everyone I have talked to likes the gel insert so far. Just my $.02 worth.