Works for me. So far rock climbing and fly fishing require 100% of my concentration and voice chatter disappears completely. For me they are my meditation.
Funny story:
Back then I was running keyhole with my son who was about five years old. Naturally you want to fly in over your house, so we did that. He saw the house and said "Dad, go run outside!"
I'm still considering signing up. I would do it in a heartbeat if, with my subscription, I could "gift" a subscription to a couple people of my choosing