Answering calls on my Mac is one of my favorite new features. When it works, it works well. When it doesn't work, it fails upfront. You really have to play with your icloud and FaceTime settings to trick it into working. It's absurd how complicated the whole relationship between iCloud, FaceTime, iMessages, and my devices is. The settings need to be perfect for things to work correctly. I can't even imagine if it was someone who wasn't tech-savvy trying to use these features.