I bought Garmin 6pro sapphire on firts day when it was released. So i will write long term review of the watch.
I had problems with it, and HR problems still persist. For me WHR only works with walk activity - approximately, but it is in 5-10% error range, and that is OK for me, but not great. Other activites that i using, especially hiking is a nightmare, HR jumps all over the place and Garmin cant find the solution. Cycling and running are approximately 10% lower than real values, we can say still ok, but not reliable.
PulseOX is not that important function for me, but still i would like to know values sometimes. But is not reliable nad you cant benefit from that. My values are from 90 to 97, and most of the time in range 93-94. But i have medical device at home, and i usualy have 98 or 99. So it is practically useless.
GPS - works great for me, i dont have any remarks about it. Some people find it quite problematic, but is works fine for me.
Bluetooth connection has some problems sometimes, but nothing to big.
Compass sometimes just freze and sometimes is uncorrect. It is good thing that i dont depend on it.
Altitude is quite correct most of the time. It has bad days though.
I miss some more sports like e-bike or e-MTB, i hope Garmin will include them in next updates.
I think if you are not pro runner or pro cyclist you cant use the watch in full potencial. Third of metrics are for runners and cyclist only and if you do multisports or you trail run or something you cant get VO2max correctly or you dont get it at all. You dont get suggested exercise and so on. I done mayn kayaking and climbing (ferratas) and basketball and my vo2max was down and other metrics too. It would be nice if Garmin can somehow implement other sports in your fitness level. It doesnt need to be vo2max, but some other statistics so you can get some motivation and some metrics values.
Battery, looks and feel of the watch are one great advantages for me and it is one of the main reasons i still own the watch. Second reason is that in our country when you buy watch you cant return it and we have long procedure for replacement and so on. So i decide to keep the watch and try to make the most of it.
But i will never make same mistake again - buy the watch on the first day. I will wait till the bugs will sort out and try it first if it work for me. Most frustrating was HR - definitely. I expected more from watch which cost 800 euros. I recommend it to pro runners and cyclist who want best battery life out there and all last metrics. For casual sportist are watches which cost less than half of fenix 6 series better.
I would like to hear your long term reviews and what do you like and disslike and if you would buy it again if you know the facts like you do now.
