ASICS sent me a free pair of GEL-ELECTRO33s to test out a few months ago. Initially I felt a bit of rubbing on my back heel and worried about blistering, so I put them in the closet. Then I gradually would pull them out and wear them casually. Then I started moving around in them, and now I'm rotating them in with my Hamptons Marathon trainers. Has anything like that ever happened to you? They are super-light and make me feel fast. Let's see where they go now. After my 10th PT session today, hopefully my hamstring will be up for marathon No. 15 as well on 9/27.