The best feature of Mi phones is without doubt MiUi. However, they are not concentrating to make the exterior design look unique.. Almost all redmi models look same and the design is "normal". There are however exeptions like Mi Mix, which looks fabulous and those who don't know should check it out. Redmi 4i was to me best looking redmi model. It's sleek and beautiful with sharp edges. Hope the next redmi brings some changes in design. P. S. Mi 4 nd 5 looks pretty rad too.