Definitely thick like a milkshake (I always have to add more water than suggested)
Make sure you have a really good shaker too because this one stays a little clumpy if not well mixed.
The flavor isn't bad but not really sweet like a chocolate milkshake. I think some of the ON whey to be sweeter than this.
But it does what it should and it tastes fine so I'd definitely buy again when on clearance.