As a Windows user with an iPhone I am very happy that they are bringing Cortana to iOS. I like unifying my environment, but I don't want to buy a new device to do that.
Do you actually use OneCloud on OSX and the mini office on Android?
I find OneCloud to be very smooth: I only have a 128GB SSD drive on my old MacBook Air and the selective sync lets me keep most of my videos, pictures, backups, etc. offline.
I don't use Office on the Android too much, but it seems OK enough.
BTW, I went with Office 365 as a price/cost decision. For $99/year my wife and I both get 1 TB of cloud storage, and if we want them the latest office suite. We both just use the web versions of the Office 365 apps on out MacBook Airs though.
EDIT: a bonus: the web based Office 365 apps are very useful on my Linux laptop - I stopped using Libre Office.
Yes, I went through a one mongth trial of Office 365 because the price seemed good and I really wanted to like it.
On OS X the OneDrive client had problems synchronizing my 80 GB archive - refused to synchronize files containing characters not accepted on Windows (like ":"), crashed several times and it was also saturating my network bandwidth. To make matters worse, OneDrive doesn't have basic functionality, like a log of what happened (files added, removed), let alone a 30 days version history. So I have to trust that their shitty client is doing the right thing.
The way I see it - yes, the Family pack is cost effective, but I'll never store 1 TB of my data on OneDrive without having logs, versioning and a client that does not suck for both OS X and Linux. I also think people get to be irrational about pricing - the price of 1 TB on Dropbox or Google Drive is as much as 2 Starbucks coffees.
On Android, Office wasn't available for my Nexus 6 (Android L) until 2 or 3 weeks ago when it was finally released. Gave it a try and it's too bare-bones, plus it had problems displaying documents from work. I expected it to work well as a viewer, but it doesn't.
I agree that it is annoying to occasionally have to remove special characters from file names. BTW, I also back up locally so a OneDrive error would be a real nuisance, but no real damage. I mainly like cloud storage for devices with small SSD drives, like my old MacBook Air.
I used to be a very happy Dropbox paying customer but I did not like their hiring of C. Rice to their board of directors.