I had to replace the whole sole on my Tech-8's. The hassle was finding a shoe repair shop, and having them do it in a time frame. The shoe repair work cost me $30 after I bought the complete sole. But after 2 months now, the glue didn't hold so well that the shoe guy used. But IMO I think it's better to replace the complete sole, rather than just the insert. But after 4 seasons on my Tech-8's and one of those seasons on the complete sole replacement, they're toast. I guess I got my use.