solidtexmex. el arroyo is an affordable, pleasurabletexmex restaurant. if you like seafood, do not under any circumstance pass up the enchiladas del mar. they are unlike any seafood dish you've ever had, and every bit as the el arroyo menu describes them.
have also enjoyed at el arroyo: spinach enchiladas, santa fe enchiladas, poblano chicken (not on current menu, ask if they'll make it for you).
the most recent visit was a little lighter fare. had a huge bowl of chicken tortilla soup (a-/b+) and a large guacamole with fresh corn tortillas. the soup's chicken was not as flavorful as their other chicken dishes. the soup in general lacked a little something to put it at the top--but still good overall.
the service at el arroyo has always been solid. never an issue w/ the service during the meal. sometimes a little slow to bring the check, but as far as food and drinks fine. the timeliness in food service after ordering is generally outstanding--more often than not the food comes out sooner than you would normally expect, and it always tastes fresh (including the tableside salsa).
don't live in the area anymore, but when in town el arroyo is always considered as one of the top places to go eat.