I've used Vivo V3 Max for 2.5 years - before it got snatched at the start of this year. It was the best value for money phone I had. No issues whatsoever and its fingerprint sensor was even better than Samsung S8. Battery backup was also v good, along with fast charging tech which was kinda new when I bought it. The phone's metallic look was also premium looking and nobody could have guessed its price, looking at the phone and specs.
Before that phone, I was using only Samsung and iphones, but after using that I realized there's very little value now for spending so much on these high end big brand phones as the Chinese companies like Vivo, Huawei, Oppo are now selling high functioning and, importantly, highly durable phones at half the price.