With the continuous cutbacks airlines have been doing for years, I was impressed by the hot meal and champagne served on the LON-PAR sector in LeisureSelect back in June.
LeisureSelect was about a premium experience (bigger seat, hot meal, drinks) while StandardPremier seems to be just about the bigger seat (nice but certainly not worth the premium by itself for a two hour trip).
I enjoyed my trip and felt that LeisureSelect was good value, but am in no hurry to try this new incarnation.