Yeah, sorry that wasn't clearer. It's just ~15 countries that you can buy a number for, but you receive the SMS anywhere in the world by email / etc.
Thanks for the clarification.
You can receive the texts when you are anywhere in the world.
Not true. I'm in Vietnam right now and SMSes from my Czech (Vodafone) number are not going through. I believe I have roaming set properly up and my Czech SIM is properly connected to a local operator. I had never similar problem when traveling abroad. SMSes always worked just fine.
This service sends the incoming texts to an email address.. so it means you can "get them" (get the emails) anywhere in the world.