I had one, used it for a few months, and couldn't figure out why the latest and greatest technology from Gillette was giving me crappy shaves. It couldn't be the razor...after all, it was promoted by all kinds of celebrities and sports stars! I finally wised up and pitched it into the trash. I think I picked up an injector at that point, but it wasn't long before I was using a Trac II.
BTW, I've got a TechMatic AND an unused cartridge sitting in my junk box if anyone wants it...just drop me a note and it's yours!
Larry (TOFLAC-U, BOTOC, LOSER, The Rubberset 400 Club, Fountain Pen Junkie, Savior of Vintage Brushes, and some other stuff I forgot!)