First off... have not tried the Ki-Tech so have no opinion on them. Have been installing the US medium on most of the 2nd gen shafts lately. Some find the soft or super soft more to their liking. Installed the tip, a medium, on my own shaft, played for several months without reshaping or de-glazing. There was a small amount of mushrooming but the tip had held its shape pretty well. After dressing the tip up the feel was somewhat different and I did miscue a few times but I did not touch the tip again although I was tempted to change it. The "problem" went away in a short time and the original feel returned. Have used the same tip now for another few months, just put in 3 hours last night, no miscues and the cueball goes where I think it should go. I think many players dress the tip too often and personally only dress the tip when the cueball does not react how I think it should be.
A curious question -- For those that are getting glazing, are you using a tip pick?