Well, this is the issue for me. If you go through two systems and neither works, why would you want a third? I decided to cut my losses and keep the current one. But it doesn't inspire confidence in the product.
Did you have an FC Twin? If so, does it compare equally or worse? I myself don't care for the FC all that much. I prefer to use the original (however, no matter how clean my toaster nes or games are it seems I am subject to the blink all too frequently).