While the finale was the episode that I enjoyed watching most, it was also by far the one that was most fun shooting.
First of all it was such a pleasure to visit Young, Kymia, and Sara in their respective homes and to get to meet their loved ones. Driving around Chicago on a sunny day in a convertible Fiat 500 with very loud music was not too bad either.
The finale is the only episode where the contestants have plenty of time to prepare their exhibitions and have no thematic constraints of any kind. They can do their work in their own studios, are not being filmed 24/7, and are not sleep deprived.
The lack of all that pressure is not necessarily an advantage. So often in life we achieve so much more with stringent deadlines than when we think we have all the time in the world on our side.