This mascara provides good volume and decent length and definition. I haven't had clumping issues with it. Mostly it’s focus though is on volume with a decent amount of length as well. I find the thick tube a bit odd (it just feels fat to me), but if that is my only complaint, then it must be a decent mascara!
The brush is average size, with no real taper, and the mascara wears well without flaking. Despite the lack of taper to the brush, I am able to do my lower lashes OK with this one. But I could see that bothering some people.