I had been looking for a seat suitable for daily driving that fit me better than the far-to-small OEM seats, and when Mark introduced this one, with Miata specific mounting hardware and sliders(!!!), I jumped on it. And I am glad I did. The seat bolsters are high enough to hold my 36-38" backside very securely, and still allow for easy ingress/egress. Finally, the seat back comes up high enough to cover the entire back of my head, unlike the OEM seat w/foamectomy, that didn't even come close.