I had the complete opposite experience in Philadelphia. A salesman named Rob came out.
I was having 3 companies come out. Leaf Filter, Leaf Guard and Gutter Helmet. He showed me all 3 products. He went over the process and how all 3 worked.
I used my common sense and went with Leaf Filter. I had a coupon and he offered me another small discount to earn my business. No pressure. I paid a fair price, he was on time, professional, and extremely knowledgeable.
He also wasn't the cheapest.
He earned my business. He deserved it and I am happy with the product.