Keep in mind there's a difference between the dealer and the rep. End users rarely deal directly with the rep and the rep may or may not actually work for the manufacturer.
As a former dealer who dealt with reps a lot, I could use lots of words to describe them but friendly and helpful aren't amoung them. LOL in the dive industry a sales rep is someone who does nothing and adds no value but get's a commission on everything the dealer buys. Of course, should the dealers sales drop or they shift their purchases to another line causing the reps income to drop, they will often visit the dealer to make threats and demands. I used to enjoy throwing them out. It helps relieve stress and reminds them who the store belongs to. BTW, our sherwood/genesis rep was pretty close to the top of my "throw em out the door" list.
The only rep that I can think of that was an exception was the diverite rep. I can't recall his name at the moment but he was pretty good.