I had the s8, and I used it for work. I have to say it is the worst phone ever. Battery was horrible, dying on me at 3 in the afternoon. It also had a screen burn from the clock, and with always on disabled.
After changing to mate 10 pro, I've never been happier. Battery life for working professional people, and they recommend the Samsung for business people, what a f**king joke. It's for morons who barely use it throughout the day, because if you do use it, the s8 & s9 will die on you before the afternoon ends. Samsung is idiotic, what decision-making do they do? Zero improvement from 8-9? They justify small batteries, I mean seriously, this just shows the world why Korea will never succeed; zero innovation, zero improvement over years. Huawei is so much better, can't believe I didn't figure that out sooner. I wouldn't have had zero battery in the afternoon, I hope Samsung dies with it's stupidity.