Have been using for around 2 years.
Good muscle recovery and growth.
Dissolves easily so you're not shaking for ages.
Flavours all taste great.
2.27kg so it lasts ages.
That said this is a 'supplement' not a replacement for a healthy diet. If you rely only on protein powder for muscle growth, you need to pull your head out of your hole.
Conversely, if your diet is lacking in protein, and for some reason you don't want to eat whole foods with protein, this can be a relatively good alternative to 'real' foods.