It's a great game on it's own right that shouldn't be mixed as an rpg. Think of it as a Jagged Alliance-FF Tactics-kind of game and you'll be fine. A mix of tactical group battles in varied missions and the wealth of Fallout lore, coupled with an amazing athmosphere.
Everybody who likes the setting should get it, it's hardly an rpg, much less than say BG, the ultimate hack'n'slasher, but there's plenty of other stuff than plain combat to keep you going and SPECIAL is the still one of the best systems to ever grace an rpg.
Edit: Wait? Not Tactics, but BoS? That gun-ho Fallout-thing? I wouldn't bother, since it's really short and not nearly as varied as Dark Alliances were. If you want a similar, but better, game; get Shadowgrounds. Unless you really really dig the Fallout-world.