"Mario Kart: Super Circuit" isn't a bad game, but it's easily one of my least favorite Mario Kart titles (and I've played them all). The main trouble is that it's highly reminiscent of the original "Super Mario Kart" for Super NES, whereas I prefer the more freewheeling style popularized by "Mario Kart 64". If "Mario Kart DS" can be thought of as the ultimate evolution of "Mario Kart 64", then "Super Circuit" is definitely the ultimate evolution of the original Super NES game.
And I don't really like the original Super NES game.
Following in its footsteps, "Super Circuit" is burdened with bland tracks, low-key action, and somewhat cumbersome controls.