I was at the range yesterday, and planned on using the MS sporter I've had for a couple years. First two fouler shots gave me errors so I just removed the MS, it was not all that important but I thought I would try and get some MV numbers for curiosity, etc. A range buddy showed up, and was going to test 3 different chrony's, a Caldwell with screens, cables, tripod, etc., a MS and a new Garmin. He did his testing, and came down to show me his new toy (Garmin), and I asked him how the 3 compared, he said all 3 were within 2 FPS, and it was the first time using the Garmin. He was very pleased, and was talking about how easy it was to set up, and use. I asked for a demo, he set it up on my bench in about 15 seconds, and it captured all 5 of my shots, so I did get my MV #'s for the day. The only thing I noticed about the Garmin is the small screen, and you need readers/cheaters to see/use the function buttons.
I still ordered one today. LOL