I purchased a 2013 Roadster demonstrator with 200 miles on the clock. The Factory fitted AC was a bonus since my wife was sold on the colour, not the spec. Anyway, initially I would have agreed with NeilM, on paper it's expensive and not effective. However, sometime later, I discover that there is a rotating dial inside the engine compartment which sets AC calibration. Turn it and the AC comes alive. I use it all the time when the hoods up, as it pumps out some chilled air. Ok, so the vents are still pointing at my trousers, but with a Morgan you have to live with the odd compromise.
