Google Cloud Print was a disaster. I could get it to work properly maybe 20% of the time, even with Android devices using the app and Chromebooks. A favorite bug involved a simple print job from one of my kid's Chromebook causing a Brother printer to "print" a blank piece of paper for every sheet remaining in the main tray.

By comparison, AirPrint just worked, quickly recognizing new printers from new devices and running jobs pretty much flawlessly.