Of course I agree with the comments from Bubba22 and others, but I'd like to add that my sim has helped me on partial swing shots as much as it has grooving my full shot swing. On my sim I will hit, for example 50 half wedges and get a pretty good feel for how far those shots flew on average. I could do the same thing on a driving range but it is hard to get accurate distances at a driving range for a group of shots. On a typical range, unless you have it all to yourself, all you can tell is that your wedge went some distance past the 100 yard marker, but it is hard to tell if it went 110 yards or 120 yards when viewing the balls from the tee. By using my sim I now know (within a range of uncertainty I can accept) how far I hit 1/2 and 3/4 8 irons, as well as the same information for my other irons. I've learned things like this on my sim in days that would take me weeks or months to figure out on a range or a course. Plus I can practice those shots whenever I want. How cool is that! I use my sim more for practice than actual play. I like to pick a club and a hole and set up the sim to hit shots to a green so I can practice specific shots at a specific distance. It''s more fun than just using the sim driving ranges.