This is my absolute favourite mascara ever. I'm on my third tube, having completely finished the previous two. It has spoilt me for any other brand.
I use the black, and it both extends and adds major volume to my lashes. It doesn't smudge (although it's not waterproof, and cleans off easily). I always get complimented on my long eyelashes these days.
Even though I'm not a huge fan of Avon products on the whole, I have no hesitation in recommending this product.
Bonus is the price, which is reasonable at full cost anyway, but Avon often have specials at up to 65%, so if you time your purchase right the price is amazing.