Many golfers tend to walk in to the store, grab a few drivers and test them out, figure out which one they like. Then go on to grab one with a stiff or extra stiff shaft. Why?! Look at your club head speed on the simulator at the store and go with the recommendation at that speed. No, the machine isn’t off or you weren’t just slow that day, today’s technology is highly accurate. It doesn’t matter about how many you hit your driver, what really matters is being in the fairway. Trust the recommendations.
For more advanced golfers, getting a full fitting is a great idea if you can afford it. It can be somewhere around $500 or more for a fitting, but if your at the point where your golf game and swing is consistent, you will definitely benefit from the fitting. A fitting will account for different factors to find the exact club length, lie angle, shaft stiffness, launch and shaft weight for you. It really is a sports science that will result in better golf shots more often.
Adam's Golf Blog 