Our guide was wonderful. Very knowledgeable so that was nice. I think the company that manages is far away from the actual location. Leave yourself LOTS of extra time even if google maps says 15 minutes leave twice or three times that. When you get to location it isn't always easy to spot your person and there might be a couple extra things you need to do..store your small back pack etc and there won't be time to get that handled if you need to. This "skip the line" as it turns out was still over 30 minute wait so don't book things too close together. If you don't like history much don't bother with this tour. The inside of the cathedral isn't as impressive as many others from a visual perspective.