Ok here goes. I booked using CO miles transferred from United and AMEX membership rewards. I have no CO status. I needed two tickets from BOS to BCN for a cruise. I first made reservations in coach and have made numerous changes all free up to the 21 day mark which has been great. I think I have maximized my return on miles and gotten two free trips as well. Right now I have used 200000 miles for two round trips in Business Class both ways. These are the Flights and aircraft and want the collective wisdom of the boards thoughts. I fly as follows. BOS to London on Virgin Atlantic A340-600 in Upper Class. Looks like a great option with true lie flats. I then fly Heathrow to FRA to BCN on Lufthansa Business on an A 321. The return is all Lufthansa in Business. First from BCN to FRA on an A321 and then FRA to BOS on an A 340 in Business. Looks like a very good but not great product but hey it's free and fit my schedule as well as the limited availability. So was this a good use if miles. Typing at 35000 on my phone so excuse the typos if they exist thanks