I think I would do this again. You could buy the metro tickets ahead, but buying the admission on the spot would be a nightmare since there are almost always lines. BUT planning is important. If you have a five day pass make sure Monday and Tuesday don't fall within the five days since they must fall respectively. A lot of places are closed on at least one of those days. I started on a Wednesday and only a couple of things are closed that day. I didn't have time to see everything I wanted to see - which is always going to be true - but on this third trip I ticked a few more items off the list, and the Paris Pass helped a lot. If you add up the cost of how I used it I am sure I did not break even but at least I didn't stand in line.
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