My son and I took this tour in late September 2019. Our guide was Eleanor ("Leo") and she was fantastic! Her love of the catacombs and their stories was evident at every stop. Some notes:
- you definitely do skip the line! We didn't wait at all despite a huge backup of walk-in visitors;
- there are a lot of stairs! you'll end up walking up and down about 10 stories' worth;
- the security is tight at both ends, both to protect visitors and the catacombs and to prevent idiots from taking souvenirs;
- Again, Eleanor was fantastic. On a couple of occasions she had to gently shoo away non-paying visitors who couldn't resist her great narration.