I’ve run in almost every version of them. Some have been great, others not so much (lace lockdown thing, upper patterns, etc). I like the 10s and have a couple hundred miles on them, wear seems pretty minimal. Other reviews I read prior to purchase were largely positive. I also run in some of the newer Nike shoes with a lot of squish, and notice the kinvara’s firmness on a relative scale…I find myself enjoying the Nike’s more and more but still use the kinvaras most of the time.