Have used ref six for many years, it is quicker on a watch to record a caution, four presses on the watch, which I think gives you a better view of fop. The worry remains electronic failure, ensuring you have 100% battery is easy. I do not use in the rain, a film/drop of any water causes chaos on an Apple Watch. Watch Ref Six You Tube to see latest development, if you get Veo type match footage you can sync your position, speed, heart rate etc to the second of each match incident. Very clever, sadly I am at a level of not getting match footage. If you do get chance to get match footage it is priceless for your development.