I found many comments on this MSC, and individual, to be right on the mark! I have these shops on my 10 ft. pole list also, due to aforementioned issues. I attempted the shop due to the fee + bonus being over $100. I should have been suspicious when I saw the postings as the dealership was being shopped twice a week! I've done many auto shops, and personally, have done many vehicle transactions.
The shop went well through negotiating until the actual paperwork was being offered, and with several critical items not listed. The sales manager explained that he would not put them in print until a sales contract was signed. They appeared to have become "shopper" aware due to the number of previous shopper visits. I contacted Mr. Snarky, who demanded (yes, demanded) that I go back and get the complete figures. I had already invested too much time, and effort, and told them to schedule someone else. At least I didn't waste time trying to do the report.
It was a great deal on a high-end automobile, the salesman was exceptional and contacted me several times trying to close the deal. Had I not made a purchase several months prior, I would be driving a different vehicle now.
I do shops for them but won't do the car negotiations as it takes a unique person and the right dealership to come together to complete correctly.