If he thinks they are the best thing ever, then it looks like he needs to test drive a Filter Queen! That is like comparing a Kia to a Cadillac.
Yeah the dirt meter is a salesman's tool, its not at all for civillians/customers to use or would ever have access to - ever. It's just something to demonstrate the cleaning ability of a Kirby in the process of the sales pitch - its not meant for anything outside of that. Without eBay nobody would have access to those tools.He is a bit silly, in the way that he put a dirt-meter on a Kirby and when the small pad clogged in his "scientific tests", and the performance decreased, he said it was a surface cleaner.