Narrating cast is gold and worth trying the audiobook alone for that.
The story was entertaining, even for someone who’s read a handful of Dungeon Core series. A core that’s trying to grow in nifty and crafty ways, the adventurers who grow and/or meet untimely ends, and the grand scheme of trying to tread carefully amongst other dungeons, guilds, and kingdoms.
My only qualm (which is strictly personal opinion) with series like these is the ending climax. Always winning by the barest skin of your teeth at the end becomes boringly predictable when you generally know how the “last stand” is going to go. It would be nice to see an ending battle that is both grand but lacking the overabundance of desperation.