I have one reservation, I can't tell for sure, but it seems that at the edges of the sapphire lens, when looking at certain angles, it looks like there is a little bit of air

When I got this watch, I was a bit skeptical about it, as I could recall one review video showing that the Fenix 3 HR watches do not have "Sapphire" written on them at the back

Switching between the two bands is not done quickly, you need two screw drivers (included), I be a bit afraid on losing a nut or one of the screw

The bezel does get scratched a bit but nothing to gnarly

It is not merely that the watch deviates a bit from the actual trail, nor is it the case that the Fenix 3 suffers from the inaccuracy inherent in all GPS devices, instead it is subject to frequent and significant errors in measuring distance (off by, literally, a mile or more in a typical day of hiking) and in tracking one's route