Mario's is a restaurant I discovered recently, although been in the area for more than 3 years. It came as a recommendation from friends, going to celebrate a birthday. I was pleasantly surprised. The food was excellent, this restaurant offers some of the best tasting dishes in the area. Especially the seafood dishes are unsurpassed, either in combinations with pasta or in bare presentation. Excellent also is the service, which is always courteous and dedicated.
The dinner prices may be a little pricey for the nearby Stony Brook student budget, but lunch is very reasonable, without actually following much in selection from the dinner menu. There is also an early dinner menu, with intermediate prices. But in my opinion, even the dinner prices are worth it, for the taste will satisfy and surpass the expectations of the casual dinner in the area.
Only one complaint, the wait on specific days can be long, especially for big parties (one time 10 people waited one hour, and not during the weekend).