iCloud vs Gmail cloud

For mail, calendar and contacts I use icloud. Google is not bad, but apple stuff is set up for it.

For storage, photos, etc. I use dropbox and onedrive. I don't think icloud is ready to compete in this regard and I have acquired quite a bit more storage with dropbox than 5gb and with onedrive I have 10tb waiting for it to be updated to unlimited.

My usage:

iCloud: mail, contacts, calendars. Experimenting with using iCloud apps, like Pages and Keynote, as opposed to the Office equivalents, at least until Office for Mac 2015.

Dropbox: file synchronization. Using aliases on my home machine to selectively synchronize folders outside of my Dropbox folder, and in conjunction with the Dropbox iOS app on my iPad and iPhone.

Google: nothing. Old Gmail addresses forward to my iCloud email address.

For PIM, Apple software and hardware works great together. There are some issues with iCloud mail as far as reliability and silent filtering which are well discussed on this forum, including in threads of my own. In the end, it's probably more reliable than some give it credit for, possibly myself included. I'm currently using iCloud mail without much of an issue to my knowledge, though have had issues in the past.

It's really a matter of what you're trying to accomplish.