+ Slow pace, I love it (level 10 at the end of the book)
- MC is a really shitty friend, like really shitty friend.
- Cannot leave dungeons mid-way unless you want to loose all gains (sounds like a poor game mechanic)
+ Robotic cat/dog given to households was a nice touch

My biggest complaint of this book is how shitty of a friend the MC is. He's apparently best friends with a girl called Eve, who has a crush on him. He knows and isn't interested because she's fat. Something he mentions several times in the book. The nicest thing I can say is that atleast he doesn't say it to her face, but at the same time she is getting bullied by other class mates and he never says or does anything about it.
In fact, he has a crush on one of the girls who are doing the bullying. That group even bullied him a little, but that doesn't stop him from jumping onboard with them and doing dungeons with them.

It was pretty icky and it almost ruined the book for me.

Other than that, I enjoyed the Threat system, and the world. Tho being unable to leave a dungeon without loosing all your exp gains and loot seems to be a poor game mechanic

I hope the MC grows up a little, there are 10 more books after all. I'll still read the next book, as I greatly enjoyed the system in this and the MCs build.