L'Oreal Voluminous Naturale Mascara is a very nice thin rubber brush mascara that provides good length and definition. I tend to prefer the smaller rubber brushes because they provide better definition without clumping issues.
The formula for Vouminous Natural is light, yet it provides very good length. I loved the look that I got with this mascara and it wore very well for me. Removal was also fine. The one downside is that the brush handle was a bit flexible, and I once smeared the mascara onto my hand when putting it back in the tube because the brush bent back and snapped out instead of sliding in. I had the same problem/complaint with Maybelline Define-a-Lash—a mascara that overall is nearly identical to this one.
Overall: a very good mascara, but be careful when putting the brush back in the tube.