I purchased two WIND Mobile pre-paid SIM cards while in Italy earlier this (October '15) month. Unfortunately, I can't recommend this service due to its lack of reliability and its hidden expenses.
The tourist package I chose for 20 euro each included 100 minutes of in-country voice calls, 2GB of data and 5 euro of balance for SMS text messages at 0.15 euro each. Fortunately, I was able to make emergency calls back the USA on our last day when our return flight was cancelled.
The signal coverage in Venice, Florence and Rome was very spotty. Outside the cities, it was pretty much non-existent. Rarely did I have more than one or two bars of signal strength and I only had 4G data once or twice. In fact, if I went into a building I would lose service completely and most of the time we had 1G data coverage.
Probably the worst part was that after sending 3 SMS messages back and forth between our 2 phones, we had depleted our entire balance. I took the phones into the WIND store and they could not explain it. I went ahead and added another 5 euro to each phone but we still could not send SMS messages - we got messages from WIND that we didn't have the necessary balance needed to send the message.
If you are going to Italy and need/want a pay-as-you-go SIM, I would skip WIND and try one of the other brands. I heard good things about TIM from other tourists but not until it was too late.