The thing about trust is it's a very individual matter. For example I do trust Google (to a certain degree), however I do not trust WhatsApp or even less Facebook. There might be no logic in this, but fact is I always disliked that the latter had a copy of my address book whereas I didn't hesitate storing it with the former. Also, I personally don't trust Apple software due to the fact that their security bugs are not being fixed in a timely manner or their way of pre-configuring their OS's in an insecure way (i.e. at least with MacOSX 10.x the firewall is still disabled as default). As company storing my data I'd probably trust them. That of course is my personal opinion.