I've been waiting for this one to come out for ages and it's clear why it's been so long coming as soon as you see it, the 16mm film used for all location shots was obviously appalling quality, and most of the studio scenes have some serious issues with interference lines down the left of the screen, plus there's even an annoying dot right centre screen for most the first episode too (surely could've removed that easily enough!?) but as ever there's been a reasonably good clean up job on the four episodes, and the CGI tastic re-do version is excellent! The CGI effect of the time machine in action and the location setting shot of the 'City Of The Future' are the only slightly overdone bits, but the rest really works well, especially the replacement of the Dalek voices and souped up final battle scene, and it all helps make the story gel and work a lot better than the clean episodes as originally shown, IMO, but it's great you can have it both ways!
The extras are great, loads to see, and it helps qualify the purchase regardless of the many insurmountable visual and aural issues inherent in the source material, and on the whole, well worth a look! Recommended!