What is to like: the cast and set design is very good quality.
What I don't like:
The idea of the games according to the 'host' was to make them equal. They were anything but equal, just take the last game (crossing the bridge) as the perfect example - people that picked the first numbers had 0% chance of survival, whilst those at the end had almost guaranteed survival.
The 'organ selling' sub-plot went no-where.
The main charater was sold to us as this guy down on his luck. This is incorrect, he was just a pathetic gambling addict. I was actually happy his daughter was taken away. Not a character to root for.

I'm only writing this to make some people aware that this drama is just overhyped because it was produced in a more 'americanised' style. There weren't any signature korean OSTs to remember and there were a lot of senseless deaths (this is all too common in american shows). Overall, as a show it is pretty average but for a korean show it is pretty disappointing. Like the title says - Alice in Borderland beats this drama by a large margin for me.