Seriously, if you have trouble sleeping while travelling, buy this thing. I have a tough time sleeping anywhere, and just the thought of sleeping on long flights makes me sad because I can never sleep properly. I bought this before a 10-hour flight, and it saved my life. Once you secure the little pillow around the headrest and attach the mask, there's no chance your head is moving sideways. My neck didn't ache at all during the flight. However, I did use another neck pillow to support my jaw because nobody deserves to see my open mouth while I sleep hahahahahahahI loved this thing, and I'm keeping mine really close to heart. It's that kind of purchase that you recommend to people and can never live without. Worth every penny.
