Great little site I've stumbled into, and it maybe worth looking into to get a few of these for your campaign or adventures. There is nothing like putting a prop in your players hand to show what you are describing.
Check out the coins..
I like to give out props or use visuals when I can in my game, I think it helps players get in the mood of the game. It also does show your players that you have taken the time to prep, and put great care into the game you are running.
While some GMs could careless, run a great game, and the players will enjoy it. But could that extra step make it go from a great to awesome?
Do you use props? How do you feel about them?