Review (5/5): At first I wasn't impressed.  It takes some practice to get it right, but it's worth it!
It's easy to put this mascara on without it clumping or making a mess. When I first started using it, I put on two coats which definitely defined and darkened my lashes. I could also see where it sometimes added fibers, but they were not consistent and only attached to a few of my lashes. I was not particularly impressed. However, after reading the "Customer Questions and Answers," I saw one that said I needed to "swirl the wand in the mascara before removing it from the bottle" and "use a zig-zag technique by moving the wand back and forth as you drag the wand upward." When I followed this advice, it looked WAY, WAY different than my natural lashes (see photo 1) or my lashes using two coats of another quality name-brand mascara (see photo 2). In fact, I got a DRAMATICALLY different look to my eyelashes, which definitely look longer and fuller (see photo 3). It loads a lot of mascara on the brush using this method (see photo 4).
I'm also happy that on those occasional nights when I'm too tired to worry about taking the mascara off before I go to bed, I get up with it still looking good and no fibers in my eyes. I love that it wears well and washes off easily without leaving any dark smudges under my eyes.
Overall, I think using this mascara takes some practice but the end results are worth it if you do it right!