Driving comfort
This makes long drives so much more comfortable.  It's my 3rd one as when it gets really cold, first the gel freezes, then the rigid mold inside breaks when I plop my 110# frame onto it.  My first one lasted probably almost 10 years, but the 2nd only lasted about 5.  You do sit up higher, so if you don't have much head clearance, it probably won't work for you.
Rating: 5 stars