Compared to my clients that choose Exchange-friendly services like Office 365, the clients on Google Apps (paid or not) have been feeling a world of pain since the Office 2013 upgrade. I remember reading a post on some official Google blog late last year talking about how they were going to aggressively target and steal Microsoft's purchase in the enterprise. In reality, they're struggling horribly to even retain the customers they've coaxed over, in my experience. Whether they like it or not, ActiveSync is the most pervasive protocol for syncing mail, calendars, and contacts across a wide range of devices. It's a travesty that they're choosing a holy war against Microsoft instead of supporting what would serve their users best.