I am also aiming at keeping this extremely spoiler-free, only explaining my viewpoint and impressions.
TL;DR:
The story was very very unpredictable and excruciatingly tense, well paced and v well plot centered. I personally enjoyed the art style which kept its strong consistency throughout. The voice acting was superb, as well as the restless soundtracks. Each character - no matter the role - felt real and distinctive. Very addicting.
Story- 10/10:
Cutting straight down to the chase - I loved the story. The story started off with a very amusing and somewhat relatable mc. The story dived straight into the plot which was a great plus. The theme of gambling and risk was very prominent throughout the whole anime which is exactly what I came for. I gave this anime a 10/10 because of how unpredicatable and amazing the plot twists are - honestly, the tables can turn in a matter of split seconds, and I was left in awe and excitment every time. The story arcs were a suitable length and I never felt that an episode was too long. It is true that at some point, one 20 minute episode only captured 10 minutes of real time. However, time felt completely unrelevant due to the extreme tension the episode created and I did not feel any loss of time.
Art - 8/10:
The art is very different to say the least, it somewhat reminds me of Ansatsu Kyoushitsu with the black inking/bordering around characters. Needless to say, I am a fan of unique art styles in anime and do place art as the least significant factor in rating anime. In my opinion, the art was pleasing to see yet it was nothing spectacular. The art style was very consistent with barely any mistakes (I only noticed 1). At the beginning, it felt like characters were designed by literally mixing and matching premade facial strucures and shapes, which didn't really affect my liking for the art - it made it seem that everyone is similar in a way. However, the art always kept a high standard and I didn't feel any awkward animations - every seemed to flow very smoothly.
Sound - 8/10:
The soundtracks in the anime were very good - they created a tense and engulfing atmosphere at very crucial times. I absolutely loved the ZAWA ZAWA~ throughout the entire anime. Voice acting was great - the casting, the emotions, everything. It really felt like the character voice's matched them. I really enjoyed the opening and ending songs, doesn't get stuck to mind that much but nevertheless, very fun xD
Character - 9/10:
The massive variety of personalities was awesome. Kaiji (the main mc) was so loveable although all his bad qualities. You pity him at so many points of the anime, feeling his pain and anguish. However, he has such amazing moments of inspiration and motivation, that you sit in bewilderment. He is a great guy, with very terrible luck and fate. His enemies differ a lot - most characters differ quite a bit. Some are extremely hateable yet others are to be feared or avoided, which I think is a great mix. Even the sideline characters have very clear personalities, which are portrayed and developed very well.
Enjoyment - 9/10:
Not much to say about this - its very subjective.
Each episode hooked me onto the next, I was flying through them more than ever. I loved the tension, the uncertainty, the risks.
