Hi! Just arrived to MAdrid and upon arrival at airport I was offered an intenational pre paid SImm from the company Exactta. They claim no roaming charges and unlimited data and no expiration. To buy the card costs 15 euro. but to load for calls is 150euro minimum. this is good as a global sim calling all over the world. Has anyone used this company. Is it worth it ? or better to just buy a local prepaid sim in spain and allow roaming when calling other european countries as well as data usage.