I have had my Fenix 7X pro Sapphire since September 2023, I know many will turn up their noses, but for me this firmware is really fantastic. Starting from the battery consumption, I noticed immediately after updating the firmware and charging my Fenix, that the battery remained at 100% for the first day, ok I hadn't done any activity, but with the other firmware the battery would dropped by at least 2%. My wrist heart rate sensor always remains active, even with the energy saving mode which is activated from 10.00pm to 7.00am. On Saturday I did an ultramarathon lasting more than 9 hours, I started with 72% charge, and I arrived at the end, if I'm not mistaken with 54%, with a loaded track and with the "climb pro" function which helped me in the go up. So I'm really happy with the consumption of my device. Furthermore, the question of the wrist heart rate sensor which remains active even when I pair my HRM Pro band is better in my opinion. This is because before I noticed that as soon as I finished my run and uncoupled the band, my wrist sensor dropped my heart rate drastically, and this (obviously) wasn't right, I also went from 130bpm with the band to 85bpm with the wrist sensor. However, now as soon as I uncouple the band, I notice that the wrist sensor remains at the values that my pro plus band had previously, as it should be. I only use official Garmin watch faces and have not noticed any lag or weird things on my watch face.