I have been running the Type A2 for a couple of weeks now. I love them. I had to weigh them on the kitchen scale when I got them home. Size 9 weighs 7.0 oz each. It's the lightest shoe I have next to the Kilkennys. I have been working over the past 1-2 years to only run in flats and these shoes have not given me a problem. Yesterday I ran 12 miles in them with no soreness afterwards. They seem to have a good amount of support for such a light shoe. I think these are designed to be a triathlon shoe since they have the vents in the bottom of the insole and shoe for drainage.
Thumbs up from me.