Brilliance.com legit ?!?

I was able to find a 2.08 ct lab diamond on brilliance.com that met all of my guidelines. With their 30% off coupon it was under $1,000!! This almost seems too good to be true as the other sites are significantly more expensive and a diamond with the exact same specifications was quoted at $2,300 from a local jeweler!

I just want to make sure you guys think they are legitimate and are a good company to go with. Thanks in advance.