Greg,
As the one guy said, you get what you pay for.
"Cheap-O-MIDI Controller' says the keys are lightweight. Not unexpected or unusual in a product in this price range. If you want something 'substantial,' you'll be paying a couple of hundred dollars for it. More specifically, he says there are no controls on it other than a volume knob. Correct, this isn't a controller, it's a keyboard. He should have bought one of the Axiom or Oxygens.
The '...maybe only one computer!' is more for the software, I believe. You can download the actual device drivers from M-Audio's site, and if you aren't using the software synths that come with it, you shouldn't have an issue. Even if you are, if you only are installing it on your laptop, does it matter?
As to 'Sad Results' and 'Some Glitches', it's possible it went bad. Stuff happens. That's why it comes with a warranty.
As to Cakewalk, I will admit that it may be a bit hard to get your head around, especially if you aren't used to doing Digital Audio, and don't understand the work flow. If you have PowerTracks Pro Audio, you can use that instead, except that with MC5, you'll get the TTS-1, which is really the whole reason for buying it.
Gary