How long will it take for ios8 to install onto my iPhone 5s?

I've heard people say it took them 2 hours or even 5 hours.

It really depends on your Wi-Fi connection and how many people are downloading it. It took about an hour for mine to finish updating. It is not a huge update like the iOS 7 was so it shouldn't take too long. Just connect to Wi-Fi and plug it into a charger so it won't die during the downloading.

It really depends on your Wi-Fi connection

Shifkfng