I grabbed a Sephora Brand Curling Mascara in Brown while at Sephora a couple of weeks ago. I’m going to give this one an good/average rating depending on the desired use. The mascara does a decent job lengthening, nothing too dramatic, but not bad either. Clumping was minimal, and overall, the mascara gives a decent look. It wore pretty well too, no smearing or flaking. I bought this one in brown, and liked the shade quite a bit. It wasn’t as dark as many brown mascaras, so it gave a nice natural look.
The brush on is slightly curved, I imagine in order to assist with curling. However, the mascara had minimal actual curling for me. Something to keep in mind though is that few, if any, mascaras can really give much curl on their own. If you want true lash curling, use a lash curler. I like the basic Maybelline Expert Tools Eyelash Curler (a great value) and Japonesque Go Curl Double Pad Eyelash Curler (which takes some getting used to, but works wonderfully). Where I tend to prefer curling mascara is when I want to be sure that my lashes stay curled after I have used a tool. Curling mascara can add a bit there. The Sephora brand is quite adequate in that regard, but nothing overly special either.
On the whole, I recommend this one (particularly in brown) if you want a light natural look from your mascara. As a bonus if you like brown mascara, this one is only $5 in brown, but is $10 in black.