A friend of mine was asking me about what to do in a 6 hour stop at MEX, but I've not been in Mexico since 1998. He wants to do a quick visit to downtown, take some pictures and go back to the airport. His layover is 6 hours on easter sunday afternoon (april 8th).

This thread is 5yo, so I found convenient to re-ask about it, the traffic, the inmigration lines, etc. Any advice?

Thanks