Hiya guys, Been a while

So, there is currently a company that suggests that if you give them a copy of all the quotes you have received, they will better, do the same installation cheaper. Now originally this didn't concern me to much but what i have found now, with there exposure and marketing, they are generally one of the companies that end up quoting as well.

Competition i don't mind, but t have now taken a fair amount of work through this method, but what do you reckon, I don't believe it's ethical (am i wrong) or is this just clever business move.

Would you favour this if it was offered to you?