The guys at AIM (makers of the Mychron and the Race Studio software) are great! As John said they’re at all major races making sure everything is working correctly. I personally have asked them about several issues I didn’t understand and they were very helpful. There customer service is outstanding! I have had pieces break so I emailed them and they got right back to me, I shipped it to them in VA and they had it fixed No Charge by the end of the same week! They seem to be at GoPro Motorplex like once a year for a couple hour course on how to you use there Mychron 4 with their Race Studio 2 software and its well worth the time and money! If they come to a local track near you I would highly suggest the class.