Fat Lady Sings grows in my Garden since 2015, it usually starts mid July and flowers at least for 6 weeks, sometimes until mid September. The Flowers are quite big but the shape is not always perfect - the color is sometimes deep and saturated but depending on weather conditions (?) quite pale.
I use it for hybridizing because of its huge flowers and late flowering time and some of the seedlings are surprising but promising - one of my latest registrations (Gekko Garden Lime Time) is one of them and looks completely different.
Some Pics of Fat Lady Sings:
Gekko Garden Lime Time (Fat Lady Sings x Suzy Cream Cheese):