Not tried a Quest, but I've had a couple of Shoei helmets over the years and currently have one of their flip-fronts. I can do nothing except sing the praises of Shoei, for design, quality, comfort, noise and weight. The Pinlock system's brilliant!
As for the Double-D, I much prefer it to the seatbelt fastener.
As for the Double-D, I much prefer it to the seatbelt fastener.