I've been using a Novation Ultranova synthesizer for a while, when I bought a second keyboard. Since the Ultranova has only 37 keys and my other had 61, I ordered this MIDI cable to use the bigger keyboard as a controller.
That way, I can play solos over many octaves and give my synth pads some extra thickness by playing the root notes one and two octaves below the chord.
I've been using the cable for about one year now and so far, the cable has never let me down (which is a bit surprising, since the MIDI protocol is notorious for hanging notes and smiliar errors).
It's long enough for most modern setups, it's reliable and it's fairly cheap. If you're looking for a MIDI cable, this one will do anything you could ask for.