Two years ago I've bought one Fenix 6X, one Fenix 6S and recently Fenix 7. Used with Android phones: Samsung, Xiaomi, Oukitel
The first point I can't really understand is that if you have not internet connection your will have the worst experience with the product:
1. There is no backup of your data in the Smartphone. So if you don't have internet you can't get your info.
2. If you loose internet connection in most case your phone would loose the connection. So you won't be able to send your data to smartphone and obviously there is no backup of your data. And you won't be able to connect your device until you connect to internet.
It's really not acceptable that in a 1000 USD watch you will loose everything if you don't have internet connection.
It's really not acceptable that in a 1000 USD watch you are not able to see your sports data if you are not connected to internet. Your scores are not yours, it's Garmin property so you can only see them from the Garmin server!!!
What make me angry is that your watch won't work without internet connection.
Imagine some kind of deasaster where you loose internet connection. Or simply you have to train out of internet coverage! You will have a useless 1000 USD watch. You won't be able to check your marks and neither download your today targets ...
On another hand I really can't understand why in Garmin Connect All they use Google maps instead of Garmin maps!!! I've paid a 1000 USD watch to get the best maps and I'm not able to use them offline in my smartphone!!! Obviously without internet connection the Google maps won't work.
I'm really angry 
. I'm training 8 months per year in Andorra and there us no Internet connection. Si I'm experimenting problems after each day of training, and once a week I have to ride 30km to get internet connection.
Its not acceptable! The app MUST be able to permit access to Data OFFLINE!!! And the app can't loose the connection with the device because there is no internet connection!!!
Now we can speak about the GLS. Here I would to share some pictures from Tobotronc Andorra. The tobotronc is the longest nature slide in the world, with a distance of 5.3 km. The Tobotronc offers you a trip through the woods sitting on a two-seater sled that you can control at all times. A new way to get to know the nature of La Rabassa and the mountains of Andorra.
Please pay attention of the red line: Garmin GPS and the position and real position of the rails:
Both lines are supposed to be exactly the same.
Pay attention of the S of the rails and what Garmin GPS record...
Look of the five S rails. And Garmin Fenix 6X had draw a okd woman.
Where is the S curves and the loop?
I've bought a Fenix 7 last week and the problem is exactly the sames.
About the watch: it's a really good looling watch for daily use and the screen is just awesome.
But sincerly if you are looking for a watch to train everywhere in the world. Instead in non internet coverage zones. I would suggest to look for another device.
Garmin: our training datas are our property and we must ve able to access to them instead without internet connection. And the watch is mine and it's why I won't need to login to be able to use the app.
