Ordered my 450+ (Premium pack) 27th September and took delivery Sunday 6th Feb. First impressions are it's fantastic, mind you I was coming from a Discovery Sport so the bar was sadly not very high. The only minor gripe is there is no owner's manual, apparently they're all online now, and the online version is only for the 350, so no specific instructions for the EV functions.
I've only driven it on a couple of journeys but it looks like I'm getting ~50 miles EV range in urban traffic and ~35 miles on motorways.