For gaming, there is a separate Ultra Game Mode that blocks background calls, notifications, and uses all resources to make it an immersive experience. You might take some time to get used to the capacitive shoulder buttons (Monster Touch Buttons), but when you do, you realise there is an edge you get over rivals (but that also depends on your skills). The 4D game vibration adds to the experience, especially if you play arcade games.
There is hardly any heating issue felt during gaming sessions or binge-watching videos; if you make these sessions excessively long, the device's Carbon Fiber Vapour Cooling System keeps its temperature under control.
The mono speaker may not be enough for gaming or binge-watching. It'd be better if you paired decent headphones or earphones. We did face some issues with Netflix, as we couldn't find the app on Google Play Store, despite updating the software.