I tried on a pair the other day but didn't buy them. They are noticibly lighter than my current shoe (Prince QT Scream II), and the arch and cushioning were right. Describing what I didn't like is hard, so please bear with me...it felt like they were too big around my ankle. They fit well everywhere, but it just seemed like my foot would slide forward. Similar to when your heel lifts out of the back of a dress shoe when it doesn't fit quit right, but instead of the heel, it seemed that way around the front of my foot.
I'd buy them if it wasn't for that. In my experience, a lighter shoe has a noticible (positive) effect.
play well,
Andrew