Question before buying psp faceplate .

Going to get the transparent faceplate

1) Is it good to change the faceplate ?
2) Which wan is better? faceplate or stickers?
3) Is it easy to change ?
4) Im worry if i change some of my button will not work . how to ensure ?
5) What if i drop my psp and the faceplate crack . as u know its non original type of fp