I've been having a go at this a little bit, I'm not sold "yet" you have a mission an important mission, get your son back... what actually happens is .....oooh coffee cup .....oooh tin can ......oooh another settler in need of help, what was I doing again.
Graphics wise, its no looker that's for sure if you dissable the bloom effects it's pretty much Skyrim with Fallout textures, game play pretty much the same as Skyrim and Fallout with the exception of the new crafting thing which is jerky as hell and takes an age to build something complete.
Enough ranting, i'm surprised to find I've knocked out 6 hours so far and I'm not bored but I never got bored of the other Bethesda titles either they seem to have a magnetic charm about them, then there is the matter of "I'll just check this place out" 1 hour later... Ooops maybe it's time to logout.
I haven't done much yet, met the minute men, found some armour, found a sniper rifle, set up the homested with power, food, beds & defenses, met 2 other groups and convinced them to join but I'll plug on some more. Probably end up nailing it all over Christmas.