I'm not going to tell you why you may want to install a custom recovery. You already know you need one to replace your default ROM or make carbon copies of your device's current state. And you know that the Team Win Recovery Project's custom recovery is at the top of your list of options.
Now TWRP has arrived for quite a few devices, including a buttload of Xiaomi phones. We're talking about the Mi 2 and Mi 4, along with their various versions. There's the Redmi 3, Redmi Note 2, and even the Mi Pad. These make the list not long after the Redmi Note 3 did the same.