I've now got a switch on my MS Bookings page to try the new bookings. Although it looks very nice, using it automatically sets the minimum lead time for each service to 24hours and it's not possible to enter 0hrs (zero hours).
We've been using MS bookings as a kind of hot-desking system and it's really important to have the option to have no lead time.
Have I missed something? Hopefully this 'feature' isn't going to be something that becomes permanent.