I think this is the best programme I've found in Italian. I downloaded several others as well (including Pymsler's) but none of those convinced me as much as All-Audio Italian. I like the speed in it, that you do not have to linger at a particular type of conjugation for ages... they tell you once how to do it, and that's it. If you need repetition, just rewind. But I don't think any of these programmes suffice on their own. A good grammar book is also needed. This programme helps you with pronunciation, some good travel tips, and gives a good insight into the way Italians converse. It's no miracle, but if you really need an audio programme, choose this, the others are nowhere near.
The audible lessons are the best I have ever used, and I am learning quickly to speak Italian, but I have been unable to download the reading materials, and audible customer support has not been able to help me.