Just before i left the hobby for a while I owned a Super Astute. It was VERY well engineered and fantastic quality. Great FRP chassis and towers. I rekoned it could have done with the alloy HI CAP dampers but i guess it was more aimed at club level. The gears were smooth and very quiet but very limiting for ratio choices due to the pitch. Strangely enough i liked the geared diff, my friend had a Mad Cap and I thought the ball diff was abit crunchy. All in all a great 2wd buggy, seems to be a bit of a theme for Tamiya...make an over enginneered first model (Astute) then a fairly basic version (Mad Cap) and then get it pretty much right with the last model!