I recently bought redmi 3s prime and I must say that looks of the phone are good, comes with metal unibody and different color variants. The phones has Snapdragon 430 with 3 GB of RAM which performs good in light usage but struggles a bit at heavy usage. The camera of the phone is also mediocre, clicks decent images and struggles a lot in low light conditions. One of the biggest milestone of this phone is it's battery backup, it lasts for almost a day which is very good.
But the thing I hate the most is it's heating issue. The phone heats a lot. Therefore I don't recommend to buy this phone.