Nice low profile case for BM40. I prefer this one over the more heavier aluminum JJ40 case with the glass bottom.
Make sure you have a plate to use with this. Didn't realise my kit is without the plate, and the switches ended up being very wobbly and not very nice to type with. Surprisingly this case is louder than when used with their steel bent case. The steel bent cause is substantially softer, maybe this case with a plate might sound softer.