I've been using it for a year now after seeing another pistol shooter using it at a comp we were at. I'd love to get an electronic target but can't justify the cost. Spotting my shots and using this app has been part of the regime thats taken my Av to 550 now. Brilliant bit of kit.
Steyr Challenge HFT - HW97K - HW80k - BSA Mercury Challenger - BSA Airsporter S - BSA Airsporter Stutzen - Anschutz 9015 One - AA Pro Target - AA Pro Elite - AA TX200SR - ASI Paratrooper (R) - Umarex M4 - Walther LP500 - FWB 80