It seems that the general consensus of the basic TwEECer is that it is worthless and that without the datalogging capability, any changes made are nothing more than a total shot in the dark. If that's the case, what good is the basic model? Is it just a $400 paperweight? How does the company ever sell them if they are so worthless? Does anybody really own one of these, and if so, how are you using it?