It's hard to get excited about insoles, so I won't try. It is nice, though, to have the ability to extend the life of your investment in higher end riding shoes with something this simple and important. Tossed the old and dropped in these light weight replacements. Didn't miss a beat. Perfect fit for the size of my shoe. Would highly recommend. After 4000 miles of road, your feet deserve at least a new insole. A lot of miles left in the well made Sidi shoes.
I would consider these as replacements for worn out original insoles but not much of an upgrade. They are very thin and as the other reviewer said, offer no arch support, aren't moldable at all, etc. Just be aware of what you are getting.
Gotta love SIDIs! A truly great shoe. Replacement parts increase longevity. You get what you pay for. These straps make my shoes work like new again. Western Bike Works sells them at a great price.