Works rumble is pretty good fun. Not sure about longevity. Quite chaotic. Only played one game though and came 3rd of 30 odd people in DM. The training bit has a nice leaderboard that uses the OS features, so you get friend notifications and can view the leaderboard outside the game.
It also uses the triggers on the PS5 nicely to give different weapons a different feel. Nice click to the Magnum like gun with each shot that disappears when you are reloading.