Filling. Yummy. I bought the vanilla ice cream flavour and was impressed with it. It mixes easily which is so great, I can't stand clumpy powders. They have a good reputation as a brand and it is well deserved. I won't be getting this exact product in the future as it is too high in carbs for me but I am certainly a loyal fan of BSN after using this product. Tub lasted me a month, 30 serves.