This is a telemarketer, and a dishonest one at that. It starts disguised as an environmental survey. For answering a few questions the caller says he/she will put your name in a "draw." A week or so later, you receive another call saying you won $1,000 worth of coupons which someone will deliver at a set time. No mention of a demo or any sales pitch. When the person arrives, however, he/she insists on doing a "demo" ... no demo, no coupons. If you refuse, he/she will give you a sob story of having "driven all this way for nothing," etc. It's disgusting.