Overall I would say it is more stable and less features than Hyprland. And recently it has Waybar modules so you can have a complete status bar. Personally would prefer Niri over Hyprland on a laptop if I do not plan on connecting monitors. The issue I had is that there are too many actions available to move windows including across monitors and setting simple keybinds for all of those becomes a problem. It just did not work for me as I use two monitors.