The Prada outlet is the best (although a bit tricky to find). Be there early as busloads of Japanese tourists might be there later in the day. I went there two years ago and still wear the things that I bought back then (classic trenchcoat, Miu Miu sandals). It is also not far from Arezzo and you should definitely make time for a visit. It is a beautiful town with absolutely charming restaurants around the market place and more shopping opportunities. The Mall is also great and you can find really great bargains (my husband got loads of nice Italian ties!). Enjoy your holiday!
thanks for that FGE - looking forward to dipping in to the prada outlet - will go early to avoid the tourists (which i am too of course!) thank you as welll for the tip about arezzo - will do tha as well .... did you hire a car when you where there?