Transferwise's borderless account

Dear All,

I’ve just got a notification from Transferwise about their new product:
borderless account (not affiliated link).

The account opening is free and you can transfer CHF to there without extra cost via local bank transfer, then convert to EUR/etc for a reasonable price.

I think it will be a pretty good man-in-the-middle tool to do my monthly transfers to my Interactive Brokers account.

What do you think about their price structure?