Have been playing the game happily since release day, (retail Dvd, playing via the main exe, not via the GOG thingy) the games been performing well on my system. No issues at all. Colour me contented.
Not played the last two days due to work commitments. Yesterday I go to download the latest dlcs from my account on GOG and low and behold no mention of The Witcher 3 to be found....... (The receipt is still viewable, so I'm sure support will fix it,) but still rather annoying .......