Thanks for the info. I ran for years in cushioned stability shoes, but with 20+ years of running now (recreational racing with training from 50-120 miles), my feet could no longer stand cushioned stability trainers. I am a mild overpronator. I had several bouts of piriformis syndrome, Achilles tendinitis, and stiff achy feet all the time. My mileage started to decrease and I was loosing any motivation to lace up the shoes and go for a run. My long runs went from 20 miles down to 12 - that was all my feet and legs could stand. I felt that my feet were restricted in the stability trainers and I was working too hard. I was fed up and began looking at the info on minimalism.
I was always a midfoot striker and started training in flats with no medial post (Avi-bolts). I had added barefoot running a few years back, so I didn't find the transition too difficult - some soreness in my feet and Achilles for about a month. But, my mileage starting climbing again and I was able to do more running with less soreness in the feet and legs and had faster recovery. I was faster and my feet felt free and able to do more work. They seemed better able to absorb the shock of impact.
I trail run twice a week, so I applied the minimalist principles to my running here and went from a big stable cushioned shoe (Montrail Hardrock) to the a minimalist trail shoe (NB 790). Again, I noticed an increase in mileage, faster times, better shock absorption, less soreness in the feet and legs, and much faster recovery time.
I will never go back to cushioned stability trainers. If you had of asked me 5-years ago if I would ever move to minimalism, I would have likely laughed and discounted the whole approach while parroting the standard "flats are for racing only" line. I am a convert.