This place offers a cozy at home atmosphere. It is casual and classy at the same time. Its like bringing the family to visit grandma. You don't need to dress your best, but at the same time, you gotta be on your best behaviour.
Considering the affordable $12-$18 for a well portioned pasta entree, the food is great. Other than pasta, they have some simple salad's, steak, and grilled chicken entrees. Bread is served with your meal.
The service here is hit or miss. It all depends on you, the customer. You have to let the staff serve you and not tread on their operational territory. They have a set routine of doing things and the customer is expected to know their place. Don't start moving around until you are escorted. Don't mumble when you are asked a question. Make eye contact. Always be on good behavior! Otherwise, you won't last long there before the service turns southward and you start asking yourself why you bothered to try this "over hyped" restaurant out. Like I said, this is grandma's house so you better stomp your feet before entering and not sit on the living room couch unless you are invited to =)
If you are going to go try this place out ... treat it like a special night out. Order the full 3 course meal with the wine! Share a salad, order entrees, order dessert, and definately order a drink. I did notice the staff's change of "heart" when you start taking advantage of the well priced goodies they offer. This isn't good business practice, but hey ... they only have limited seating and for now, this place is busy!!! Expect 30 minute waits!
I suspect Rosa's does catering in the day time to movie studios, sports training facilities, etc etc. They are well networked and have on display numorous celebrity photos dedicated to Rosa. "The last time I had this much fun, was in my last movie" - Ron Jeremy.