It started OK, but soon turned out to be a pile of nonsense. I wish I had waited, giving people the opportunity to write reviews reflecting the vacuity of the production.
I gave it the benefit of the doubt in spite of the poster that looked like the one of the "Squid Game" (another pile of nonsense). There are too many impossible elements (e.g., guess who is among the hostages? guess the fooling strategy to get out by digging a tunnel [how many YEARS would that take? and with which equipment?] several characters changing during the episodes! useless stuff on which the hostages try to capitalize ...).
The acting is nothing special, and the subplots outside of the heist place don't add anything to the episodes.
I am actually too polite to state outright what I think.