I've been reaching for this mascara quite a bit recently. It is very easy to apply, gives good volume and a bit of length without any clumping issues. (I seem to be having a lot of clumping issues lately, so that point is very important.)
The problem is that after about 12 hours (the pics here are after about 14 hours) the curl does start to leave, so my lashes look a bit... wilty. But, no clumps or smudges in sight!