Personally, I have never had an issue with Dropbox on any device that I am running. The very first app I'll install on any new device is Dropbox without even thinking about it. At this point, cloud storage has become an independent category so I don't mind using an additional service that is not part of Google, Microsoft, Amazon, or Apple. Normally I try to consolidate the number of apps/services I use, but Dropbox performs exceptionally well and I trust them.

Congrats to Dropbox on achieving this milestone!