Lyca Mobile Roaming

Hallo,
doesn't anyone have made some experiences with Lyca's roaming packages, what would be just perfect when travelling Europe.
It says that you can use the EU bundles as at home except the data bundles and SMS (between your number and "base country" numbers, as far as I understand).
In addition the Lyca to Lyca are limited to 100 min, when you are roaming.

But the big question is, how can I book data bundles in/for my roaming country

Lyca:
Can I use my data allowance in the 17 countries? If not how will I be charged?
You unfortunately will not be able to use your existing data allowance, instead you will need to buy a relevant data add-on in order to use your mobile data.

Asked by Stefan via WorldNomads.com