My experience of Super Mario Bros. is that it is one of the best platformers out there. The controls are solid, and tight, to the point where if you make a mistake, it is ultimately your fault. However, most newer platformers seem to forget this. An example would be Sonic '06, as among it's many glitches and flaws, it has terrible handling and controlling. The video down below will show how badly the controlling in Sonic 06 is.