I haven't played it yet but I would wait a few months before getting it do to issues. For the Xbone version you end up hitting 0fps in certain areas so I would wait until the game becomes more stable to play.
I've yet to encounter one of these fabled 0 fps drops. There is a 500mb patch I had on day one, so that might hace fixed it. But this is the least buggy fallout game I've played, I'm yet to experience a crash. The only noticeable frame drops I'm geting are to around 20fps when you're doing intensive stuff like flying in the vertibirds.
It's easily more stable than current-patch 3 and NV.