Thanks for the replies!

I have booked AA - JFK-CDG (Paris)
Swiss Air - CDG-Zurich-IST
Turkish - IST - LHR
AA - LHR - JFK

Swiss Air & Turkish are partners on the same AAdvantage award only 25,000 miles for a business class ticket inside Europe.

I think its a great bargain as British Air charges 40,000 miles.

My business partner wants AAdvantage miles so she will fly JFK-IST-JFK on Turkish.

The reservation system seems great with advance seat assignment easy and a no smoking policy world wide on the airline.