Just ordered this, so I don't know how good this it yet. From the reviews that I've read people seem to hate or love it, but it seems like me cup of tea so I'm looking forward to it.
The blu ray isn't the showcase quality aparently - but it is ok, and has tons of more features than the dvd. Read this for more info on that...http://www.bluray.highdefdigest.com/1981/repogeneticopera.html
You can get this for 1p cheaper on amazon, but of course without the quidco. Also its worth buying the Blu Ray as the cheapest DVD is from sendit.com for £5.83, so the extra 4hours of features and marginally better quality should be worth the £1.19 difference.