I wanted to use this with my Alesis DM5 Pro electric drum kit, the cable arrived earlier expected and works very well. I plugged into my laptop running Windows 7 64 bit and it immediately began installing, can't get more plug n play than that. I opened up FL Studio, loaded a drum VST (Addictive Drums) and hit the snare drum on my e-kit which instantly made a snare drum sound. No other software or drivers necessary. There are also two lights on the dongle in the middle of the cable that light up to show when MIDI signals are being being sent in/out of the cable which is very useful. Regarding what the last reviewer said, I can confirm that this cable DOES work with ASIO4ALL with absolutely no delay or loss of quality (for FL Studio at least - not sure if that makes a difference). Perhaps computer spec (such as the sound card) has something to do with it although my laptop isn't exactly 'high-spec' but still works with asio with this cable. Not sure why the last reviewer's didn't work.
In terms of build quality the cables are quite tough and seem like they could withstand quite alot, you simply can't go wrong with this product. Where I work these EXACT cables are selling for £19.99 each which seems ridiculous when you come to Amazon and find them for a fraction of the price.
Brilliant - 5 star