Anyone have any first-hand experience with Roam Simple (roamsimple.com)? In particular, I'm looking at the Europe SIM Card, because I'm going to be visiting a few different countries. I'm on T-Mobile prepaid and can't roam internationally in Europe. I know it is not the cheapest option (compared to, say, buying local SIM cards once I get to Europe), but I want to know my phone number beforehand and have the same number in multiple countries. I'm more concerned with convenience and reliability.