Well, there is an improvement for voice calls.
This page -
http://www.togglemobile.co.uk/PDFs/uk/Roaming-UK.pdf - shows rates for intra-Europe calls, texts and data.
But 3p/minute to call landlines and mobiles in 31 countries is good news for me. In some cases this represents a reduction from 7p or 9p to 3p. (I'm not a mobile data user, so don't know whether 0.15 is good.)
The only problem for me will be to remember to register local numbers. In practice, this isn't many.