The Walkera Ladybird is the perfect quadcopter to learn how to fly with or even just to sharpen your skills up.
It can operate inside and outside with precision; it's smart control board which has a sensitive three-axis gyro system that automatically stabilises the quad to a horizontal position if the control sticks are centred.
Devo 4 Controller
It has four channels which allow you to control the throttle (up and down), the ailerons (left and right), the elevator (forward and backwards) and the yaw (spin around anti-clockwise and clockwise). Not only this it also has a D/R (dual rate) button which allows you to change the sensitivity from beginner to expert.
The Devolution remote controller included is a 'standard' size, so if you were to go to a larger quadcopter, it would most likely have a similar size remote.