I've been riding on Vittoria Rubino Pro's for years on my road, commuter, and track bikes. Gave these G Speeds a try on my road bike and was amazed by how much smoother the ride was, and better control around tightfast corners.
It feels like they have less rolling resistance than the old Pro II's, but I don't have any personal numbers or testing to back that up, BikeRollingResistance.com seems to score them high however httpwww.bicyclerollingresistance.comroad-bike-reviews?bvittoria&maxweight401&max23&min7&minpr7
So far no flats in the 9 months I've had them. Ridden mostly on roadtrack 2-3x a week and 2x races.