Is Google Cloud Print reliable?

Yes, very. It is backed by the might of Google, has been and supported by many applications across a wide range of operating systems (including PC, Mac, iPhone, iPad, Linux, Android, Chromebook – see: https://www.google.co.uk/cloudprint/learn/apps.html). Many hundreds of printers from many manufacturers also have dedicated built-in support for extra convenience (this is not necessary to use it) – see https://www.google.com/cloudprint/learn/printers.html.

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