I've had a .mac address since 2000, when iTools debuted. I'm all Apple at home, but it's a Windows world at work. My girlfriend and I both have iPhones and iPads all running iOS 7, and three Macs between us, all running Mavericks. For me, silent email filtering, both outbound and inbound, concerns me, but as far as I know, nothing critical has ever gone missing (of course, how would I know!?). Gmail is more robust, but I find it better to pick an ecosystem and stick with it, so I've gone iCloud for everything. It's been pretty solid for me. Just to be sure, though, I do weekly backups of contacts, calendars, reminders, notes to Dropbox, and hourly email backups to an external hard drive via Time Machine. I rely on the icloud.com website at work, and I find its features lacking, but it gets the job done.