I've enjoyed this, and many other films in black & white for years and don't have a problem with it
( Even the DVD gives the option to watch the film in it's original format).
Several Doctor Who stories like the Mind of Evil and The Daemons have been colourised using bits of existing colour information. These and others which were originally filmed in colour, and have now been painstakingly restored.
The end results turned out very well, considering these originally started life on videotape.
I can see the advantage of returning these to colour as this is how things were originally intended.
I can think of quite a few series I'd like to see colourised, Dangerman and Burke's Law would be on the list, but when it comes to Gerry Anderson shows there's two series, Supercar and Fireball XL5 that might benefit from the complete run being colourised.
In the UK both series just don't get shown on TV any more because of theIr monotone look. Stingray, being the first ITC programme with marionettes to be film entirely in colour has managed to appeal to several generations due to repeat showings, plus all that lovely new merchandise!
On Stephen La Riviere's excellent Full Boost Vertical Documentary there is a short piece of specially colourised test film footage from Supercar.
Personally, I'd love to see these old series being given a whole new lease of life and the chance for new generations to enjoy them, and as to colourisation as a whole, I'm certainly not averse... as long as I've got them in their original black & white.