I don't know the company, so I cannot comment other than on what I see on their site: there is nothing that stands out one way or the other from a hundred other online jewellery sites. The return policy is reasonable, and the fact that they are ready to use GIA-graded stones is a good sign.
The prices are unexceptional. A GIA 0.33 H/VS2 can cost as little as $450, which times 3 is $1350. A 3-stone plain setting in 14k white gold is $700 or so - put the lot together, and you end up way below their "sale" price of $2752.
As to comments specifically about the diamond: there is no way of knowing what you'd be getting. A top quality cut H-VS2 is quite a bit more than a good or fair one. They specify "minimum" colour and "average" clarity, but it's not clear what they mean. Average over "your" ring or over all the rings of that type? Does a VVS1 average with an I1 to make VS2? Or is is VS1-SI1? Finally, there's all sorts of details around things like polish, symmetry, fluorescence that can make one stone look better (or at least different) than another.
Edited by davidelevi, 08 November 2011 - 08:34 AM.