I must say these shakes are a delight, I actually look forward to drinking them now instead of fearing the moment I have to chug down another bad-tasting shake.
The vanilla taste is very good too, I actually prefer this over the choc but they're both good, hope the banana does not diappoint me.
Mixability is awesome, best I've ever seen. I don't use a blender but a normal shaker. I shake like 5-10 times and it's completely dissolved, no residue or anything! I think you could mix this in a glas and a spoon with no trouble at all.
The only disadvantage I can think of is the fact that I have to dig in the tub the first time to get my scoop out, but that's due to the shipping and IMO inevitable