Just got back from Rome this week.
We used Walks of Italy for our tour at the Vatican and I must say it was FANTASTIC. Our guide explained things to us that we would have never even have known.
We were in the Sistine Chapel with maybe 30 people or so, then got to go back in later when it was crowded. But still, was able to have about 15/20 minutes with it not empty but virtually empty.
The bad part of the tour is that, although we were not exactly rushed, we didn’t have the time to fully absorb all of it. However, I understand because the tour only lasted 3.5 hours and we really need 3.5 weeks.
But, we were able to go back through at our leisure.
I would highly recommend Walks of Italy.