The reason I bought the U-24, though, is because it also has MIDI In/Out, which means one less USB peripheral hanging off my laptop on stage. It works really well and allows me to control my external hardware synths from my USB controller keyboard and from my DAW software (using the DAW to aggregate the signals).To be honest, I initially bought this because it was the cheapest solution I could find to audio and MIDI in a single device. My expectations were modest but the U-24 has shattered them, being so much better than I could have hoped for. I am really struggling to think of something negative to say about it. It is exceptionally well thought out and executed. If it's features meet your needs, I think you'd be hard-pressed to find a better USB audio device at any price. I don't like to give products five stars but I really can't think of any reason to take off even half a star here. It really is a brilliant device.