I use Ubuntu OS and simplest way to use Microsoft Office suite on linux is Online Office 365 -accessing via Onedrive.com or Office.com. Having most of the important files on OneDrive, I’ve no problem switching from device to device (or between different Operating systems). Although LibreOffice (which comes out of the box with Ubuntu Desktop) is pretty solid and has more features than MS OfficeOnline, I rather prefer online office365 as it automatically saves files on OneDrive.
But Online Office lacks a major feature. While working on document online (on a web-browser), you cannot insert files/pictures into document from your cloud storage (ie. OneDrive). I was shocked to find that its missing! This feature is so obvious that Google Docs has this since years. You can insert images from your Google Drive to spreadsheet/presentation/doc -without having to upload anything from your local machine.
C’mon, Microsoft! How could you miss this? Now I have to download some of images stored on OneDrive to my computer just to insert and upload them on my Word/PowerPoint document!