It's my second international transfer with TransferWise and I couldn't be more satisfied. This could have the potential to seriously disrupt banks' business in transfers. I had serious doubts about using it, it really seemed much like a scam like you regularly get by email, but then I saw two people I know on Twitter recommending the service. After a quick chat with these guys (the Simpletax team), they said the service comes highly recommended and they even knew the team behind it. Can't recommend this enough, really.
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