I watched some gameplay footage of this, and it looked like it was basically just one battle after another.
How is the base game? Does it have a decent plot and an ending? It's currently 70% right now on Steam, and I was thinking of grabbing it.
Well its a party based rogue like dungeon crawler with X-com like base building. There isn't much of a story, but there is a lot of atmosphere. There are also a massive number of mods on the workshop, which adds some fun, especially with a replay. I'd recommend House Full of Piggies, Unleashing the Kraken, and Army of Bones, as they address what I consider one of the great weaknesses of the base game, namely the lack of enemy variety. I think its best played when you have 15-30 minutes of free time, and not as the primary game you're playing through. I go through a dungeon, prepare for the next one and then exit, so that when I return I'm ready for the next one. Sometimes I'll play through 2 dungeons in a sitting, but rarely more than that. I found my first playthrough enjoyable for about 15 hours, which got me through most of the initial boss battles. This time I'm shooting to get characters to level 6 so that I have a chance in the endgame dungeon. We'll see if I get that far.