There are two really good Mexican restaurants in Rockland. This one and Ole Ole in Suffern. Fiesta Cancoon offers all the standard dishes you would expect to find in a Mexican restaurants. They also offer $5.00 margaritas. They have a nice special lunch for $8.00 on a daily basis and you can often find groupons to cut your dining cost. I've eaten there many times and never been disappointed.
They have an outdoor terrace that overlooks the Hudson River but they are prohibited, by local law, from serving alcohol outside.