Why don't you hire him and find out for yourself?

Point understood, but.
 

Wouldn't you want the whole experience to be pleasant from beginning to end and get what you ask for? Instead of landscape let's say you wanted to have dinner. You go to the restaurant and have to be bullied by the waiter who refuses to take your order for chicken and demands you have the filet mignon, well done. You don't eat red meat, but if you did you would want it rare. Why would you subject yourself to that? Why wouldn't you warn others of abusive behavior by a retailer.
For those who have used him, fine. For those who would like to avoid a confrontational and abusive salesman, thanks for the warning.