So I gave Refsix a go last night. My son's U14 boys team played a girls U16 team in a short-notice friendly (really more of a scrimmage), so I volunteered to pick up the whistle instead of having to go for a more traditional run earlier in the day!
I was actually very pleasantly surprised at how easy it was to operate. I use a Garmin Fenix 5, so I don't have the touch screen. The game was played in 20-minute thirds to give the coaches time for team talks and adjustments. I didn't have any teamsheets, so I just entered numbers as I went. I did keep game info on my normal reusable card as I usually do. To be honest, it was a lot easier than I expected to be. The heat maps and statistics are pretty awesome! I've used a StatSports tracker in the past, so I've looked at the stats and heat maps to see how I'm working (I don't live by these stats, but I do note if there's a game where I don't come close to my normal levels). The Refsix stats are a lot more detailed in terms of how long I walked, ran, etc.
The only thing that didn't seem right was that it didn't pick up a portion of the third period for me. I was at 1.5 miles (give or take) in each of the first two periods, but only at 0.55 miles for the third period. I know that can't be right, as the third period was a lot of the girls team playing long ball and the boys team then breaking the forward line with 30-40 yards of space to run. I did most of my high intensity running and sprinting in that third period. My Garmin also showed me at 4.47 miles for the 60 minutes, so I don't think everything synced up properly in the third period. But since it was my first time using the app and I don't think it's quite ready for prime time on a Garmin yet, I didn't get too worried about it. I also messed up and recorded the two third-period goals for the other team (my son's team won 9-0, so I had plenty of practice recording goals!!), and it was pretty easy to fix the goals on the app and/or laptop when I got back home.
I definitely want to try this out in more games to see how it will work when I have misconduct and when I use either a chest strap heart monitor or an arm-based monitor for my heart rate. But overall, I had a much better experience with it than I thought I would.