After a disappointing flight in premium economy from Singapore to Paris, I was offered an upgrade to business class for the return leg a month later. The email arrived the day before the flight and was too good to refuse. I gladly jumped at it, and thank goodness. I was able to use the lounge at Charles de Gaulle airport before the flight. The accommodation was spacious and comfortable with a seat that fully reclined. The food was great and the choice of movies outstanding. All the staff were lovely - very helpful and friendly.