I used this today for USPSA practice sessions and it worked perfectly once I had the sensitivity adjusted. There was another shooter in the distance and it did not falsely pick up those shots. I kept the timer in my shirt pocket. The delayed start function is great. I would like to see a bigger start button and a way to auto save each round and reset so you can quickly restart then review your stats later. You can save rounds, but it somewhat interrupts the shooting flow. Would also be nice to be able to see a list of all your scores in a table and maybe a way to average your times to get an overall session average for the day. These are just suggestions however and the timer does work as advertised just fine and it saved me over a $100 from buying a dedicated shot timer! Id happily pay $10-20 for this if it had those extra features.
kkphoto about Gun Shot Timer, v2.2