I've had CP for two years after switching from Delta. It's tough for me to put a dollar value on our 20+ CP round trips each year because we would never have purchased her tickets for actual cash. So her "free" trips actually cost us more money (for her food, drink, entertainment) rather than saving money.
But her travel companionship has given me a new lease on life. I had been getting burned out being on the road so much, but now travel is fun again because every trip is a bit of a "romantic getaway". So it's making me willing to retain my nice-paying job, or at least my sanity. That's pretty high value!