I've been sailing for 20+ years with Royal and typically would NEVER book air through them; however, I just recently called them for "haha-sake" on a one-way ticket I needed to pickup Brilliance transatlantic from JFK to London. Honestly, there prince was 1/3 of what the airlines were selling the same seat for and it was refundable! I couldn't believe how great the deal was, I grabbed it right away. I'm now always going to check with ChoiceAir as it really was a great deal!
I did get to choice the flight I wanted at the time I wanted - so I was in complete control of that; no different if I were to book it through delta directly or something.