I never thought about the insoles in my shoes before, but a few months ago, I started experiencing a little pain around my ankles and along the side of my leg when I ran. Yup - it was time for new shoes and someone also suggested I replace the insoles with some gel insoles. I grabbed a pack of Sof Sole Athlete InSoles and it's been one of the best purchases I made (can't say the same for the running shoes I bought). The cushioning is fantastic, and I can say that I haven't experienced any of the symptoms I was having before.
Sof Soles says: Maximum Cushioning for High-Impact Activities; Gel heel and forefoot protection; Hydrologix™ moisture management system; Max cushioning; Medium arch.
I say: These insoles rock ... hard!