Love it. I use the R5 and the RF 100-500 for aviation with CFExpress card. Mechanical shutter, 12 fps is enough (20 fps gives a ridiculous ammount of pictures to go through). Nails focus but could have wanted smaller f-numbers, especially this time of the year with short days (it's already getting dark at 2 pm.). Came from 5D MkIV and EF 100-400.
Now I edit with DXO PureRaw + Capture One (+ LR if necessary (like the new masking tool).