I catch it on a very regular basis, last year it was cancelled once when I was travelling and by the time I got to the lounge they were ready to send me straight to the BA gate to get their soon to depart flight.

Its MUCH more reliable than the first BA flight and almost every time I've flown it arrives early or on time.

However I also use the BD15/13 and an overnight stay at the CP or HI J4 to boost my PC points plus the flight and hotel cost is usually cheaper than the BD1 on its own.