I've now finished all 1-30 units of Phase 1, in anticipation of a vacation to Italy, and am very impressed with the program. It's not your standard memorization / grammatical structure drills like we had in school. It teaches you conversationally, in a very organic way, that seems to assimilate and stick better. I think the conversational emphasis gives you a more natural accent too. Highly recommended.
This is a pretty useful addition to your audio files for Italian--you may not want to learn words for going fishing or golf (two of the dialogues) but it's great for comprehension and picking up common vocabulary and idiomatic expressions. You need to already have studied Italian!