We had planned to see this site when we were here before, and were very close to it when we visited Acatitlan. but it didn't work out. So we tried again. We got there after it closed (there are actually two sites here that are very close to each other), but this is a good one to visit even when it's closed because you can't see much more from inside the fences and you can't climb on the big one. So if you're trying to visit lots of pyramids in that 10-5 opening time, you don't have to worry about getting to this one on time. Acatitlan is better to visit before closing since you can climb the pyramid.
I loved the snakes here.