In addition to the above, I would like to add that to this day, I have not found another affordable device on the market that offers the wonderful real time step sequencing that the MC-303 does. While the interface is not the greatest in the world, it is very functional. This is still my favorite rhythm sequencer in my aresenal of musical goodies.

Now I understand that there are software programs galore that do real time step sequencing (FruityLoops), but I'm old school about such things, and really appreciate hardware MIDI sequencing.