I am using this device for 1 month now and I havent noticed any problems even after a heavy gaming usage. There is no lags till now and no heating problem. It still moves smooth as a butter.
To put S8 style software in a budget phone was a genius move by samsung. The finger print sensor is fast and it has an excellent amoled display.
The phone is very user friendly and fits to almost every using style whether rough or smooth.
The camera is great and produces some good photos but seems half baked sometimes though. The sound reception is decent and quality is good.
The design is too great by samsung for a 20000 phone.
Battery is sublime and lasts long.
Overall a great buy.