Very Interesting, Even though it doesn't deserve to carry the Fallout franchise title.
Visually the game is awesome, for a top down, 3D version of the usual 2D sprite based PC titles. Realtime gameplay is decent and the controls are adequate that anyone proficient with a PS2 controller can have a good time with this game.
Don't buy it for the storyline though, as every character you can unlock and play as has the same storyline and plot to follow. Very straightforward, and feels much like the Diablo games.
Definitely worth your time, but I'd buy it from the bargain bin or the previously played titles bin.