The R10 has generated a huge amount of discussion, and for good reason - the numbers it generates for many users are considerably short and/or unreliable. I'm having these issues as well. Regardless of unit height and alignment, I'm losing 1-2 clubs of distance. This is very frustrating
However, I still finding the R10 was worth my money. Why? Because the R10 has improved my game more and faster than any other training aid or club purchase. Ultimately, that's what I bought it for.
Using Home Tee Hero, I can now play numerous practice rounds in between my "real" ones. Even though the absolute distances are off, they're off consistently so I can substitute the club required for the distance in HTH. If I hit the ball poorly or in the wrong direction, the R10 detects that and penalizes me. This includes the occasional shanks, slices and hooks. It's helping me dial in my grip, swing plane and ball striking, all of which is making me more consistent on course.
I'm playing at about an 11 handicap index. Within the first couple weeks of practicing with the R10, I had a 37 opening 9, my best ever 9 holes. Unfortunately, a couple blow-ups marred the back 9 that day. Another day on the same course, I had a 38 on the back 9. I shot an 83 on a difficult course where my course average is 90.
Hopefully, Garmin will be able to remedy the problems so that the unit will track more accurately. I'm counting on that in a future firmware update. But, in spite of its shortcomings, the R10 has proven to be invaluable, and HTH has made training much more fun and productive and I have little doubt that it will help me score more rounds in the 70's soon.