The shaker was easy to use this morning
The powder stayed dry and separated inside the lid
The button was a bit hard to push but that is so it doesn't accidently get pressed or bumped if you have it in your bag
The ball orb that seals the powder chamber acted as a blender ball and I liked the noise of it mixing in the bottle
The shaker is very good quality and is leak and shatter proof
My pre workout powder did not stick to the bottom of the shaker either
The only thing I did not like is the attached lid is so long that you have to hold it when drinking so it doesn't flop all over...and you get a tiny bit of liquid on the side of the bottle from the lid stopper that was inside the bottle. The lip you drink from is small as well so the bottle kinda obstructs my view when I'm drinking from the shaker and driving.
I really recommend this shaker as well. It's pretty cool when you press the button and the powder drops.