This is a great article describing what exercise machines you should avoid and why. I agree with all of these, as I'm sure you can tell throughout our workout sessions. I am a believer in "functional training" and exercising on a machine doesn't allow functional movement training. If you must use a machine, make sure you do it correctly, and please don't use the machine often :)

Check it out: 6 exercise machines you should avoid

(SW, thanks for demonstrating what not to do.)