I put mine on the front of the seat riser under the driver. I don't have room in the middle due to the T5 shifter. My feet are pretty much always stretched out toward the pedals, and the floor space on the passenger side is still open for stuff or people with stuff. Only thing is, I inadvertently mounted it so it's pinching the mat, so if I need to pull the mat up for some reason, I have to take the extinguisher out of the mount.
Picture
