This was a great tour. Our guide was very interesting and told us lots of details that really enhanced the experience of everything we saw. We took the afternoon tour and it was getting a little dark by the time we were done, which made some of the pictures not so good. Otherwise it was fine.
Skip the Line: Vatican Museums Walking Tour including Sistine Chapel, Raphael's Rooms and St Peter's
This is a definite must if you are going to the Vatican. The lines are every bit as long as they say. We thought we would go over early to spend time in St Peters, but even the line to get in there was around the square, so it was nice to have that at the end of the tour. The tour itself was very informative, and enhanced everything we was. The head sets made it very nice, because you didn't have to be standing right next to the guide to hear.