I was craving a burger and figured with a name like Black Angus, theirs would meet my needs. I've had better burgers and I've had worse. I'd go back if I was in the are and heard the burger call again (I hear it often enough).
As for the 4 stars, I was flittering between 3 and 4 (half stars Yelp! half stars!) ... Korina's 3 star rating seemed to be the decider for me. With our powers combined, we're at 3.5 - which is just about right.