I can tell the difference in a nano second between the person that just wants to sell you something from the person that actually cares what she/he is selling. I prefer the latter.

If I had come in to buy a white couch, and someone said to me what you said to her, I would have thanked you. It might not have been something I thought about. I might still buy the couch, but, I would have felt like I was properly informed.

I had had some work done in my bathroom. I wanted these shelves built in to the wall. The guy told me what he saw as a potential problem with one of them. I thought about it, and decided I could live with it. I appreciated his candor.