It's easy, it's as simple to use that in one day only you can learn the tool and start working on it. I've used it to make prototypes of my final designs, it provides quiet good animations to customize.

It can customize a lot and it can easy communicate how to code the prototype with the developer

Protopie has a lot of functionalities for pretty advanced protoypes, easily compatible with Sketch, I always use it flawless - collaborating a lot with my team of designers