Dr. Scholl's massaging gel insoles for Women
I got these free as part of being a BzzAgent. Friday I shoved these babies in my Skechers Oxfords because I knew I'd be hitting the shops after work. They lifted me about a 1/3 of an inch and rubbed the back of my heels against the shoes, but otherwise they weren't a problem.
I was able to comfortably walk for several hours. My feet did begin to ache after about 3 hours--which is fairly normal with or without inserts. I didn't really notice feeling particularly massaged. Given the cost of these ($10), I'd have expected a little more of a boost. Fortunately I got them free.