Its interesting enough to watch through but it's predictable and at times, uncomfortable to watch. The main character Yumiko is basically a super human. She can't lose and when she does it's only after she's predicted the way the game will go. Literally every character other than Ryoka (Yumiko's friend) cheats in one way or another and has seriously cringey psychological problems. The entire show borders on fan service in really unnecessary amounts and almost glorifies mental instability and deceit. Understandably deception is a major part of gambling, cheating however is not. Unlike other anime with a game or life skill theme, there is nothing to be "learned" in kakegurui. It would be far more interesting if it actually broke down statistics, game play strategy or even how to gamble properly. Instead it chooses to focus on how to cheat and then humiliate the person after getting caught which inevitably turns into a scene where the characters look like they are going to either, bang, murder each other, or a combination of both.
TLDR: Do not let kids watch it. And know that there is a lot of over the top cringey sexual content with characters that are essentially supposed to be in high school who have an absurd amount of money to burn for no reason at all. You will spend most of your time guessing (correctly) the next cringey thing that will happen.