We went some friends that are local to Cuernavaca and had a blast! We left Cuernavaca around 7:30 am during the week, stopped at the plaza market in Tepotzlan to have tamales y atole, and then started climbing! The climb was great: well-marked, with rustic rock-stairs, and shaded. There were ample places to stop and rest. I recommend going during the week so that you aren't competing for space with locals who go there for exercise on the weekends. Take water and money to pay to get in at the top so that you can climb onto the pyramid and snap some great shots. Oh! And there are no bathrooms, so keep that in mind. :)
Once you're done, don't forget to visit Tepoznieves in the town. They have AMAZING icecreams in all kinds of flavors! Don't miss it!
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.