The high value transfers are interesting, I mean incoming EUR and outgoing EUR within SEPA that's not something that is going to bring profits to TW, right? Their main source of earning is foreign exchange.
I personally find TW very expensive when it comes to FX︂ rates fees transfers. Their charges, although obviously better than banks, are still very high. You︃ can really negotiate close to mid market rates with companies like Moneycorp and they have︄ no fees for sending payments anywhere in the world.