Pros: Price, hotel locations, organization, tour guides/director
Cons: Some included dinners, the trip eventually ends.
We were a party of 6 who booked the Italian Mosaic with Globus the 1st two weeks of April 2008. For the money this tour is outstanding.
A few suggestions
Do pack light!!! Even if you do not add anything to your suitcase while in Italy the luggage seems to get bigger. Bring snacks and a sports bottle to fill with water (Crystal light On The Go also helps). Rick Steves Italy 2008 tour book is oustanding we used it daily. Do explore on your own especially at night. If possible try and book with friends or family the bigger the group the more fun you will have!. Don't over do it on optional excursions especially the dinners (except the Tuscan and Farewell). Try an limit yourself to 4-5 at he most. Don't worry about the value of the dollar you only live once so don't put the trip off!!
You will fall in love with Rome and Sorrento. I can answer questions (including excurisons) if you want to email me email@example.com.