I recently got this set from Spain (it was announced for Italy but was delayed there and elsewhere - it's also been announced in Japan and the UK but for certain territories certain films seem to be missing from the set - the Spain includes four films that were in the previously released overseas DVD set), and I've watched the first two films, Murder on the Orient Express and Death on the Nile.
I'm afraid for those two films it's a fail. Orient seems to at least be a newer transfer than the one Studio Canal did for the overseas four film set on DVD - cleaner and decent detail but with color that's just not right. The Paramount DVD has perfect color - a couple of the scenes in the Blu are so off in terms of color timing it's really not good. Unsworth shot the film with really heavy diffusion so one must account for that, which I do, but the off color is really a shame. Obviously Paramount has an element with the proper timing and Studio Canal doesn't have the timing notes or didn't use them. There are also some real odd things afoot here - a mystery worthy of Miss Christie: According to someone on this forum, Albert Finney's name seems to be missing from the end credits (I didn't notice it and haven't gone back to look, but I believe him) and Colin Blakely's name is misspelled in the front credits - both are correct on the Paramount DVD. One wonders exactly how something like this could have happened.
Nile is an older transfer and looks it - no real detail at all, although obviously a bit more than the DVD. But very substandard for a Blu-ray and again color that's a bit too yellow and a transfer that does no justice at all to Jack Cardiff's spectacular photography. It should look amazing - it looks okay at best, slightly better than the DVD but detail is almost completely lacking
I'm expecting Mirror Crack'd and Evil Under the Sun to be the older transfers, too - if they begin with the older Canal logo they will be - that's how Nile begins.