One problem with it is it requires a constant network connection for everything, which is baffling for software designed for devices where major intended uses involve being in situations with poor or no network connection.
You can't do things like sync the watch to the phone and look at visualizations on the bigger phone screen while you're offline.
It's weird how much they still maintain a difference between a "fitness" watch and an "outdoors" watch and the supporting software.
It's the silly bifurcation between Garmin Connect and Garmin Explore software and online service worlds. It seems like an arbitrary accident of corporate history and leaky abstractions.