I non-rev, arguably more than most here, with my family and have never missed a flight in 3 1/2 years. Only twice were we not all sitting together. Usually 3-1 o 2-2. Never scattered. And 85% of the time, we’re in stretch seating. I’ve had non-rev benefits on 5 other airlines, including a legacy, and Frontier is by far the best in the industry, as far as I’m concerned, at utilizing non-rev benefits.
The only real issue at F9 is our dartboard-like schedule.
I’d also like to add that our F/A’s have been stellar at “taking care” of us as non-rev. But ALWAYS have your credit card out and ready, just in case.
By far the best benefit, as others have mentioned, is our EZ20 positive space ticket. 20% off the lowest fare, assigned seats, and 2 checked, 1 carry-on+personal item. Can’t be beat AFAIC.