I'm not using one, but just a sharing, M51 was released about 2 years ago. so if you're thinking to purchase this model, perhaps you could go with or wait for the latest model.
I'm actually using it's successor; M62 (released a year ago). well yea, it's a great device with a huge battery capacity.
Talking about playing games on this device especially PUBG, no I don't play PUBG, but I layan Genshin and Fortnite. Overall, good performance. 15-20 minutes playing before the frame drops and heats up.
