It's worth getting, IMO. There's plenty to do and explore. The DLC are quite fun.
If you like base-building then you may find you spend hours and hours doing just that. You may also be interested in replaying the story in new ways too. There's more choice to the story than in FO3 or Skyrim, but less than NV.
The game runs pretty well, with what I would consider to be a fairly minimal amount of bugs/glitches, for a Bethesda game at least.
Mods will also bring you a fair amount of extra options.
It's worth getting at a discount at any rate, especially if you get the season pass too.