After a difficult setup (have FO4 an Steam) I got it running. Apart from some minor, easily solvable Bugs and seldom, not so minor Crashs it runs smoothly. The immersion is great. Fantasic Music, good radio-stations and mostly great speakers. The storytelling is good and rivals, at times surpasses the original full titles of the series. For completionists: It's a big map, equals FO4+all Addons. Here and there you find parts in the world that appear less refined and rather empty. As a fan of the series I'm quite delighted to have found a new full FO-Game and have been enjoing it for weeks now.