It works wonderfully for me at least, for one counter anecdata. It only works well because I can swipe back and forth between screens with the touchpad. I don’t know how I would use a mac without one.
To me the full screen feature is really useful. I work with my notebook in a stand right by the side of an external display. On the notebook I keep everything in full screen mode except for the VS Code windows, which stay in the other monitor. When I need to switch from browser to Slack, Spark (email client) or Spotify, I just have to swipe with two fingers on my Magic Mouse or with four fingers in MacBook's Magic Trackapd.
Has anyone? I'd love to see the stats on this. One of those things that looks prettier than it is useful.