I have the first one installed , my next statement is qualified with me being a time served sparks when I left school at 15 that was 51 years ago I am not a house brasher but more industrial leanings
They all suffer with one drawback with the RCD on the incomer if you have a fault that trips the RCD it all goes off and you are in the dark , you need a unit that has a normal breaker for the incoming and the RCD on the ring main cct.
Now comes the crunch with RCD and workshops that we use it's the VFD drives that have delta filters on them the will ,do trip RCD with the delta caps passing enough to earth to trip it , not all do it
My Myford does it and I have tested it carefully and it ok ,it's the filter for the odd order harmonics that cause it to fault the RCD when you switch off the lathe.
Now you may ask what I have done to sort it ,I have disabled the RCD my choice ,not recommended but I have things earthed correctly and I am confident that I am safe , I have also put in a copper earth rod local to the WS and I know this is good because I have tested it and it's less than 0.1 ohm
If you are not sure please be safe and consult a qualified sparks about this but your light must not be controlled from a RCD the must stay on when the ring main faults
Remember you cannot see it ,smell it but by ek you can feel it