You don't say if you're american or else.
The principal problem with driving in Mexico is that some people don't follow the rules. Many pass by the right side, don't use the direction lights, don't stop at the stoplight, etc. Also, the police is not very helpful and many will try to get a bribe.

This is not so true at the tourist zone, and shouldn't be in any case a reason for not driving in Mexico, but you should take this into account.