Rhapsodo-quirky, I know my yardage per club and this unit consistently measures 10 to 20 yards short. Issues with app crashing occasionally. No landscape mode? Quite a few emails with Rhapsodo cust. service didn't really help, but they were attentive to my issues.
Mat-I rarely hit a shot fat when on the course, but with this mat(prostrike) you can only "take" a minimal(and I mean minimal!) amount of the turf on your swing or you will feel your club drag substantially which is nothing like hitting on real grass. Unless you are a golfer who hits every shot perfectly, I would not recommend this mat.