I use the screw-on bottle underneath for protein at the gym, very useful. Mine has a leak somewhere when I shake liquid inside the shaker. I didn't bother to look for a replacement. Apart from that, I am satisfied.

Very good! I have never needed the storage compartments it has underneath, but it makes 10/10 protein shakes.

Very good and convenient blender with two containers to keep your powder (meal) separate and not mixed. It doesn't leak, and it has the iron inside to make the blending result smoother.

Exactly what I was looking for! The most important thing is that it has a ball for mixing and it dissolves the protein very easily and without much effort, and it doesn't leak. It comes with 2 additional compartments for powder, one shorter (fits exactly one scoop 32g) and one taller that fits about 1.5 scoops. Both can either screw on from the bottom, making the bottle taller, or one of them can be placed inside the shaker and stand on the top. It also has a compartment for vitamins/pills that screws on the bottom, but in order to prevent it from falling off, one of the two compartments needs to be screwed on from the bottom, and if that one has powder inside, like protein, a minimal amount of powder will pass onto the vitamins (it is isolated, but not 100% sealed). It doesn't bother me, but others might have an issue with it. Also, the compartment for vitamins takes up a bit of space from the compartment that screws on from the bottom, so if someone wants to put in a scoop, they need to use the larger one. Overall, it's a very good purchase and it has been very convenient for me.

Very good, a bit pricey in my opinion, but it comes with a ball inside and also has three extra compartments for other things. Complete