Short and forgettable better at 4.99 imo.
Overall it feels like a minor side quest instead of a paid DLC add on. The level you play in feels rather small and the enemies aren't particularly threatening. The story line is not compelling or meaningful but rather serves as an excuse to do something. The area you play in "Zion" can be a little frustrating to navigate if you don't follow the paths set out for you which isn't great for the explorer types. The new weather system for rain looks terrible, it's essentially the same line of drops duplicated all over your screen; it's silly, looks bad and so in your face you can't ignore it.
Because of the above reasons and the price point this one is getting a mediocre rating from me and I gave new vegas and dead money a 9. If you feel you needed another side quest go ahead and buy!