And also TIM Italy has the "TIM in Viaggio Pass" offer, slightly different from that of Vodafone IT. The preference depends on individual needs:
http://www.tim.it/estero/tim-in-viaggio-pass
10 Euro
7 days
500 Mb
125 minutes calls in
125 minutes calls out
250 SMSs
APN: wap.tim.it
Vodafone caters for brief stays and allows more data and calls each (calendar!) day at a slightly higher daily cost.
TIM gives a lower average daily allowance but lasts a week (it should be a real week, but from very recent personal experience I would say that is more like a calendar week, whatever they might telly at the call centre or you can read on their site) and if resources are managed wisely, switching to wifi when available, it can end up being cheaper and more convenient to use.
I managed to stay well in the limits by using this strategy.
In theory no tethering or PC connections.
In practice, at this very moment it works with no problems, until any limits gets really enforced.
I have no definite choice here. I use both options depending on what I am going to do and how long I stay abroad. It is an individual choice to be made.
Warning:
switch off the "TIM in Viaggio Full" option which is automatically activated every time with the "TIM in Viaggio Pass" option, in order not to get "ripped off" in case you go beyond the allowance.
Sleepy