Heaven, sheer heaven.
Shuu's large-in-size, light puffs come densely studded with crunchy cookie bits ("croquant" is the proper term I believe) and filled to almost overflowing with a chilled custard cream that's so wonderfully rich and thick, it reminds me of melted ice-cream.
I had the coffee flavoured one today (they use "Trablit" brand of coffee extract which sources only the best beans) and basically inhaled it in record time.
Inhale it you will too I'm sure - Shuu's puffs are really THAT good.