I only recommend buying falllout 4 if it's on a good sale. It's not a bad game but a terrible fallout game. On that note you need to pay almost 80$ now to get full acess to a barely average game. Is the game enjoyable ? yes. But it gets boring rather easily and and you'll feel disappointed with what could've become an amazing open world post-apocalyptic game.

Pros :
- massive gameplay and shooting improvement
- world building
- weapons and armour customization
- better graphics

Cons :
- terrible optimization
- illusion of choice ( dialogue options have no impact )
- repetitive quests ( go there, kill this and come back for reward )
- exploration is boring most of the time.
- ridiculously few weapons and armour
- bugs ( this is a bethesda game after all )
- little to no role play ( your character's background is established strongly and your'e more or less painted as the good guy )

ATTENTION
One very important thing to note is that the Creation Club as of now downloads every mod available and then locks all of them out while occupying disk space .... a 2gb patch purely for paid mods * cough * scam * cough *.

I said it before and I'll say it again, I only recommend buying this game if it goes on a good sale. Even then the choice is yours knowing the pros and cons of the game and how bethesda treats it's customers.