I've had mixed results from different pro shops. Many moons ago I took my bow into a bigger pro shop in Northern IL. It was mostly a gun shop, but they had a guy there who really *thought* he knew everything about bows and bowhunting. I brought my bow in once to shoot some targets and mentioned I was having some problems getting my feathers to clear the rest. He grabbed my bow and a said "Well, here's your problem." He then took a pair of pliers (pliers!) and bent the 'L' shaped rest on my Huntmaster 2000 until it faced away from the riser. Needless to say, I kept my bow far away from there from then on.
The guy ended going on to work at Basspro (eek) and the 'pro shop' hired more competent archery staff.
Now that I live in Central IL, I've tried a couple of pro shops. BlueRidge Backwoods Archery shop in Monticello is my favorite. Recently, my nice NAP rest suddenly became the feather-eating-untunable-rest-from-hell. Deb worked on it for two hours straight and never once did she break out a pair of pliers. (though, "mallet" was brought up more than once) Eventually, it was determined that the rest was somehow broken and no amount of tinkering could make it work right. A new rest later and I'm not making feather confetti everytime I shoot.
-end rambling here-