Having to sync passwords manually sounds like a hassle.
With 1Password all my credentials are on all my devices, always up to date. It integrates with the password management APIs on iOS so I can create an account on a computer and log in using this same service's app on my phone seconds later and the password will already be there, I just have to stare at the device for a second and I'm logged in.
It's all incredibly seamless and I can't imagine having to go back to managing passwords manually.