FWIW.
My own Airbox 'Aware' ordered Wednesday 17th March & arrived by post this Saturday 20th morning.
No hassle, just switch on, accept usual warning by pressing the 'globe' and it finds where you are, reference the appropriate U.K. 1/2 mill. chart & simply works as promised.
Too much rain to try out in the plane today, but Spring can't be long (?).
mikehallam.