To say that a long line is a good baromter of the sucess of a business would be apropos in the case of Nica's deli. You better get to Nica's before noon or you will wait in line. In less than a year of its existence - Nica's has clearly supplanted Romeo and Joe's as the best deli in town (though both are comparable).
Both fully served meals, deli sandwiches assorted baked goods, produce and fruits shipped in from New York city daily are a few of the reasons this place is always packed.
I'd say it's on par with what you would expect to find in a top New York city deli.