I recently started using Manjaro arm64 and so far it has been really easy to use, The OTB experience (out of The Box) was awesome. Everything on my PI4 Worked out of the Box..No adjustments needed and all i did was overclock to 2000mhz and wella, of course I did have to overvoltage to 6 and gpu to 700 but otherwise temp is steady at 38 degress celsius. even my tempreture gauges are working great.
take a look:
I am really happy with the lookj..the desktop is KDE