If the reason to go is to remind yourself how great it is to live in the US, then go for it. Otherwise, it is a poor, dirty, third world city. It is nothing like the Mexican Riveria, where they hide the poverty and crime.
To give you an idea of how bad it is down there, the Navy and Marine Corps has banned US service men from traveling there while on active duty due to the fact that they were getting drunk, and then "Rolled" (Robbed and beaten) by local residents. Save your money, and use that day to visit all of the great Southern California spots.