The new Air Zoom Maxfly More Uptempo is equally as responsive as the great Maxfly spikes from the past few years. Somehow, the shoe feels a little supportive, better built overall. Also slightly more stable. Maybe it's just the great new graphics (I don't miss the blinding yellow Maxflys). The track contact is instant and yes, comfortable at the same time. Ran 200's and 100s yesterday in them and will see how they handle the 400 next. Great, great shoe.