I haven't checked out the dlcs personally, but I will pick them up on this sale when I get home just because I enjoyed the base game so I'd like both support them and see what all the dlc's have to offer. I'd recommend just getting the base game, alone it is a good value at that price, add in the mod community and you're sure to get even more bang for your buck. I think the sale ends tomorrow night so if you check out the base game tonight/tomorrow night and enjoy it so far then you can pick up the dlcs, but I dumped ~15 hours into just the base game with no mods before divinity starting taking up my time, but I did enjoy the game a lot so I plan(ned) to go back to it. I've heard the base game takes 15-20 hours to complete, but it seemed to me I was still a long ways off, I had pretty much just finished exploring the main area and was about to start branching out to other parts of the map. I'm a gamer who tends to explore everything and not the type to see how quickly I can beat a game so that may explain the difference.