The Deepest Sleep gets one star less from me compared to the first two in the series. Its music, sound, environment - everything was good as before. What I didn't like is the story, which is just an opinion, so I can't really objectively say anything was not good. I just didn't like what happened and I would have wanted it to finish in a different way, good or even bad, such as with the character dying or being stuck in a coma forever.
Still, great game. I would love a remake with better graphics (although I understand the appeal and effect of pixelated graphics on horror, but good graphics can invoke it as well), and a slightly changed and more fleshed out story. I can dream, right?