If I gather http://support.three.co.uk/SRVS/CGI-...e=Ext(EM38751) http://www.three.co.uk/Store/SIM/Pay_As_You_Go correctly then I could buy a 20GBP Three SIM from eBay and have 12GB (!) of data to use in these (and more) countries. I only need data. That's a crazy good deal. What's the catch?

Restrictions are mentioned if you roam for two complete months but after these four weeks I will toss the card never to be seen again