The cable cart experience is fantastic. The view whlie you are going up or down is beautiful and shows you most of Caracas, while you also have fantastic green mountains scenarios. But the experience does not end in the cart itself, one you arrive to the top, you have a great environment with nice food and hot chocolate everywhere, and an overall experience that you must have if you visit Venezuela.
Warning: If you are a foreigner and do not speak spanish, I highly recommend you have a local friend to go with you. You might not find too many people that can speak English there.