Their prices are on par with the biggest online retailers and more competitive than all of their local competitors. They were patient during my decision-making process and were never pushy.
The obvious benefit of purchasing from them versus an online store is you get to see the diamond in person and make a no-risk decision. And that's what I did. They had a diamond in stock that had the specs I wanted and the price I was comfortable with. However, it was graded by GemScan and I preferred something graded by GIA. So the owner Thach said he'd check with his supplier to see if there was a similar diamond that was graded by GIA. A couple days later, he called me saying he found a stone that exceeded my expectations and was still in my price range. I went to check it out and it was exactly what I was looking for.
With regards to the setting, I found photos online of what I was looking for and emailed it to them. They were able to replicate the design as closely as possible. For those who don't have a specific setting in mind, Hollywood Diamond has a few dozen styles on-hand that one can pick from.
Needless to say, my fiancé and I absolutely love the final product and we would definitely recommend their store to anyone shopping for an engagement ring.