I’ve tried both the WMR and Virtual Desktop (for Pico 4) versions of MR multiple times, last time for WMR a couple of months ago and VD a couple of weeks ago.
The VD one is a lot better but I still can’t use it,the little distortions are too immersion breaking for me.
The WMR one is awful as it causes all kinds of wobbliness in external view, propeller issues etc. On top of that it doesn’t seem much smoother to me than 45fps locked without MR so it’s a no brainer for me.