As David and Joe do, I have the Trophy spoiler (and splitter) on Penelope too.
As I said in Jan's thread, they came with the car and, whilst I wouldn't necessarily opt to have them, I do like them and think they suit the car well. I would say that a splitter adds more performance-wise than a spoiler.
If I had the choice, I would replace the F boot lid with a TF boot lid with integrated spoiler:
Which I think looks better than the bolt-on addition: