The Cathedral was being partly renovated when I visited it, but the inside was really beautiful. Obviously, there were a lot of tourists which wasn't really a problem. The problem was more that only a small part of the church was free, if you wanted to visit the centre, the catacombs or the tower you had to pay extra. At the end of the day it's still a church so I don't really see the point. How ever the catacombs are really worth visiting as well, being super interesting and a rather unusual sight.
This review is the subjective opinion of a TravelPod member and not of TravelPod.com.