This really wasn't what I thought it was....
Well it was but it wasn't it doesn't do exactly what I thought it would do I wanted this to try to pull recorded music off my Yamaha keyboard but instead it only hooks up to a computer to record new music that you play not prerecorded stuff that you already played.

It Just Works
Bought this to connect a Kawai MP9000 stage piano to a macbook pro using garageband. Works perfectly!

Very Simple to use
My computer does not have a MIDI port so I was looking for a simple, inexpensive way to connect my MIDI controller/keyboard and the EM8780 is exactly that. I am running Windows Vista and did not have any trouble with the drivers. I use Finale and did not have to do anything to the settings for the MIDI input to be recognized. This is a great product.

Nifty way to drive & receive MIDI signals from USB port
The cable provided a nifty way to drive and accept MIDI signals when you only have a USB port on your computer. I did notice a bit of lag in the action when pressing a key on the Roland MIDI keyboard and then hearing the sound from the speakers on the computer. But considering that I had no other method at hand for using MIDI with my computer it works pretty good.

worked perfectly first time
I plugged it into my Yamaha PSR - 340 keyboard, then into my Mac computer and started playing and recording instantly. It works every time. And it works great with Mac's Garage Band. Of course it works, that's the joy of a Mac and the new leopard system. Sorry to all you who went with Vista.