I had the mat in my E46, and just got the e92 mat in my, well, e92. It's a good fit and easily as good as the e46 style. In fact I really like the higher sides for spill control, but there are cutting guides on it should you want to use the full width of the trunk.
One thing I do like better is the material is grippy, almost sticky, so stuff stays put, especially as I also have the luggage net in there to keep stuff from becoming a physics lesson while I drive in a spirited manner...
2017 F87 M2, MG, M-DCT
2002 E36/7 Z3 2.2 Sport 5MT
2016 F22 M235i Coupe, MW, ZF8