Because the Windows 10 Creators Update is fairly big, there's more potential for things to go wrong.
That said, the upgrade doesn't always run as smoothly as it could. Once it's done, your machine will have a raft of new features and improvements for you to try out. It might take some time to run, but you can generally ignore it and concentrate on more important things. Windows 10 updates run automatically in the background, so you're free to get on with other tasks.
