I bought the ISE at the local "Do-It" home building center. It was a couple hundred bucks, which I thought was crazy, but when I read that it had all stainless, I took a chance that it would be worth the money. I've seen a lot of rusted out, crappy, low power disposers over the years at other people's homes, and there was just no way I was going to own one.
It was kinda cool growing up with my dad working in the appliance/kitchen cabinet distributorship. Our kitchen became a display kitchen where customers could come over to the house and see stuff in action. We had some super expensive "gold edition" WK disposer that was supposed to be even better than their "standard" model. We had a flat top electric corning range and all the special corning pans to go with it. I can't remember the brand of dishwasher, possible a Kitchenaid, but we had a clear plastic door that could be locked inplace with the real door open, and then the machine could be run to demonstrate the cleaning power. Huge Kelvinator fridge, Tappen(I think) Microwave that could take metal objects inside, and possibly the coolest thing, a huge Char Glo natural gas grill...right there next to the Corning range.