Fitted mine, OEM a few days ago, chose the M logo as well, bit of colour looks nice. For OEM you need to lengthen the slot in the door panel to 64 mm, two seconds with a stanley knife sorts that out. The replacements are longer and also have a nice metal heatsink block to keep the LED cool.
I found that my internal cabling was not long enough to connect them without removing the door panel, this is an easy procedure and gives you the chance to clean behind it while you're in there. If you put a bucket under the door the panel sits nicely on top of it without straining any wires while you work.
Well worth £55 of anyones money....