i think anyone who is a die-hard fallout fan may not be 100% pleased with this game but it's a worthwhile title in the series. you can say what you want about the game, but there's no way you can say this game is bad unless you do not like games in this genre. i have been a fallout fan, and very skeptical about this game, but not because if it would be TRUE TO FALLOUT but if it would be GOOD. i'm not really going to disagree with the line of thought that this could easily be called WASTELANDER or some other name to this effect but this game still does a decent job representing the fallout series.
the game seems fairly long, and to say that some of the quests are bad is not really being fair. if you have a ton of quests to do, of course a lot are going to be terrible. the game does a good job of letting you choose not to do quests or the multiple ways in which you can do them. the arefu quest is probably the worst i have done in the game, but at least you can kill those guys instead of following along with the lame vampire bullshit. so i don't think these are completely fair arguments, because i would rather have these terrible quests in the game rather than not at all (because it's optional).
this game has some problems, bunnymilk and headphonics outlined most of them. there's a lot of cool things people haven't been mentioning though. if you look at something like the weapons, i don't think i've ever played a game that had this many. a lot of games that have a ton of weapons usually just recolour the weapon or do a terrible job at differentiating the weapons, but every weapon in this game looks unique and has a good feel to it. the comparison about being oblivion with guns is a valid, but i think this game does everything oblivion did but is better in nearly every respect. i really don't think this is a bad thing, because fundamentally oblivion wasn't a bad game, it just had poor execution. look at something like ranged combat too, which in oblivion consisted of only bows and magic (both of which i thought were terrible in oblivion, and every spell was a different coloured flying ORB).
this game doesn't have top notch ranged combat you'd expect from a FPS, but it does an adequate job. it has body specific aiming, meaning head and limb shots actually DO something. most games only have HEAD SHOTS, and some games don't even HAVE body specific aiming (PROTIP: mass effect which was a SHOOTER by nature did not even have body specific aiming and people apparently loved the game). unlike oblivion which i felt was essentially MASH MOUSE ON RAT all day, i think the combat is pretty fun because you can approach it so many different ways especially with the many weapons. it actually requires a little thought and oblivion completely lacked this.
all this said, even if you played oblivion this game should be fairly enjoyable if only to explore and mess around in.