My example is; I texted a reg yesterday for an in-call for this Sunday, outlining time slots and special requests, a couple of saucy texts later, she confirmed with hotel booked by her, just room number to follow on the day.
No stress, easy process. I suppose the advantage is she knows I'm reliable and will show.
A new WG booking can be uncertain, but with fairly good research and UKP checks, can work out okay, but then again it would be 30 mins first time around, so she could still strike out.