I got the Ultimate Edition the other day and played through all 4 of the add-ons.
Freakin great. Old World Blues was hilarious, Lonesome Road was great and creepy, Dead Money was challenging at the least, and Honest Hearts was just a good "kill shit" arc.
Wish I could have brought Christine back from the Sierra Madre, though.
One more thing, what is up with Bethesda and just throwing fucking terrifying creatures at you from the get go?
Subject: New Vegas DLC