I miss running in my vibram's, but i'm going to stay away from them. Nothing feels better (well except for that night or day after when your feet sometimes get scary achy out of nowhere), other than possibly running completely barefoot. I stopped running in my vibram's shortly after a huge thorn went right through them and impaled my foot, eh. Just too much to worry about. They definitely helped me in the prolonged midfoot running department, more so than I think i've ever experienced in my spikeless track flats. So i've taken some of those adaptations and lessons learned to my XC flats.
I prefer running in my spikeless flats (XC shoes); very strong soles, very light, very comfortable when running mid foot, feel so much safer, can run faster.
When I used to try and run midfoot in "traditional jogging shoes" (way back, in say 2004-2007), I'd get calf soreness for literally 5-7 days. To the point where initially I couldn't even walk. It was so brutal. Needless to say I didn't become a midfoot runner back then. I grew up as a heel striker with heavy shoes, so prolonged midfoot running just destroyed me. I still have to be careful with it, but soreness only lasts a day or so and it's not extreme.
my random personal experience 2cents
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