I went once for a wedding... stayed at the home of the rum guy Joaqin Bacardi. He made a stop on the way and told us to stay in the car with the doors locked as the area was not safe. And we were only a few blocks from the marina. The music was very loud everywhere. Not my kind of place. But I've heard the same about Acapulco... if you stay at the tourist hotels and don't venture away, you should be safe and have a good time.