I'm not sure just how good the value proposition is here. I mean we're talking over £50 per 100MB. Not bad for roaming data perhaps, but is it actually cheap enough to make it worthwhile? Hunting for the WiFi still seems like a good idea!

Occasional yet regular use? Perhaps this would be justified. I think it might appeal to me if I was taking my iPad to a lot of the countries covered on a regular basis, so I could still grab emails when there's not a hotspot to be found.