Summary: I had purchased this product as an inexpensive way to learn a little keyboarding without buying the full item with all the bells and whistles. Took 2-3 hours to figure out how to install it thanks to poor instructions from the manufacturer. The keyboard was obviously primarily for Macs (I run a Vista home machine) and certainly did not work with my OS out of the box with any of the software provided!
Summary: You get what you pay for. The M-Audio Keyrig feels as cheap as a Casio keyboard. The pitch bend and mod wheel are kind of nice,sturdy rubber, but the keys are light and feel like they could break under your fingers if you really whaled on them. There are no other controls on it other than a volume control. If you want a control surface with some knobs and sliders you may want to look at this model's big brother. I used to have an old version of the Oxygen 8.
Summary: I bought this keyboard from Best Buy. It is not a very good keyboard. It has the following problems: When you are in the normal Octave (both octave lights on the left are on which is the default), when you go into G4 and above which are on the right, the keyboard produces a very muted sound. It is a drastic transition from F4 to G4 keys. It sounds OK when you set the keyboard to a lower octave. Also, in the normal octave mode, chords A minor and C sound the same.