In the past week I've done both lunch and dinner at Diamond Market Bar & Grill, so now I feel ready to write about it. On both ocassions the place was indeed busy and jam-packed with people, so if you don't enjoy loud-ish venues this is not the place for you during high traffic.
Both times I had burgers, during my lunch foray I had the BBQ Pulled pork burger which was delightful and prepared as requested. For dinner I had the Deluxe (or was it Royal?, either way it had an egg in it) burger which was GREAT except for there was too much pink in the burger that I ordered with no pink. The fries were great on both occasions and I'm a sucker for fries.
Based on my experiences, the quality of the food, the good prices and the decent drink selection (didn't go into it since no one ordered any) I can certainly see myself returning to this venue. :-)