How does electric scooters fare in Kerala roads/terrain?

I am thinking of buying either Rizta/450x of Ather as there are many charging points in my place (Trivandrum) but I am a little worried if it is worth it due to the higher price range. Also how does EV scooters work in Kerala especially in hilly terrains does it go well? Also wanted to know if anyone specifically used Rizta varient as it feels too bulky and how it fared in busy traffic or narrow lanes of Kerala.