I have the sport AT trans. I'm not sure if it's that much better or not. It's nice in stop and go traffic to manually shift between 1st and second gear, or just leave it in 2nd (less jerky then having the tranny pick what gear your gonna be in, and sometimes getting confused) don't need to use the brakes at all. As for it acting similar to a manual transmission, it's pretty far from that. There is a pretty large time lag between shifting and the actual gear change, so you have to shift and floor it a second or two before you actually want to shift gears.
Anton