Absolutely is it worth it, as long as it has all the DLC's included. And the NV DLC's isn't this workshop, contraption, gadget crap that we got with Fallout 4. These are real DLC's that add (mostly) to the story and playtime.
Even at 19.99 (with DLC) it's worth it.
WhiskeryDude: The only time I am seeing lag is during certain weapon swaps. There's always been a little lag there while using custom and/or modded weapons, but after that last "update" it's gone to the extreme. Like, 5-10 seconds before my weapon "loads" and is in my hands. And it's not every time I swap weapons. Just the first couple of times. Beyond that, I am not seeing much lag anywhere else.
Tweaked: Ended up in a rad storm and noticed a 3-5 FPS drop. 60 to 57ish that would fluctuate. That wasnt a particularly intense storm. I keep forgetting to check FPS in the really nasty storms.