I'd wait a month until the 3rd party guys in your local area start doing screen repairs on the cheap. 6 screen replacement costs around £40 in my area and that includes calling out to your home to do it. 7 should be similar.
That's a terrible advice, actually. You're not only going to void the warranty of your brand new phone but probably also compromise the IP67 rating. With all that adhesive and gaskets used, I'd never ever let that phone but repaired by anybody except Apple.