I'm going to catch flak for this. I don't care.

What a day it will be when instead of engineering and designing our robots, we'll all go out and buy our parts from our favorite manufacturer, and bolt the pieces together. If we wanted an erector set competition with everything simply to build, we'd be doing Vex. Remind me how buying a pre-designed machine will teach my students how to CAD, design around many variables, and fabricate/test a system? Oh wait, it won't.