My setup in basement is working fantastic, all shots are at my normal distances compared to my Garmin S20 on course distances. Even the deviation is correct with my 6i, 5i that I need to work on over the winter. Impact screen is 9'wx6'7h", Ceiling height is 7'5" to top of mat. Screen is 8' to front and R10 is 8' behind, I have not tried 7 feet to see if any distance changes. I have tried a few 3w and they are at my distance too of 240y but I feel ceiling height impedes my follow-through so have not hit too many.