Teotihuacán is one of the major tourist attractions in Mexico City – a place that’s full of attractions. I urge you to go. It’s easy to get to. There are decent eating places out there and lots to see and do. There’s a museum and a cultural center and plenty of places to buy souvenirs. And if you’re feeling energetic, try the climb up to the top of either pyramid. At the very summit of the Pyramid of the Sun there’s a metal spike sticking up an inch or so out of the stone. Do what everyone did when we were up there - hold on to it and let the Pyramid’s energy flow into your body.
If you go with an experienced guide, one who knows his or her stuff, there’s lots to learn and see and think about. But if you just want to visit and take in the ambiance of one of the world’s great archaeological sites, then Teotihuacan is still enjoyable and rewarding.