I'd be curious how you're using MSFT Office, but I've been bouncing between a Surface Pro for work and Mac Mini at home, and love the Office 365 suite.

Virtually 100% of my clients can open Word / Excel / Powerpoint documents, and you'll have to pry Excel from my cold, dead hands =). I personally love the power features of Excel, and even do some VBA scripting to automate some workflows in Excel and Outlook.

I don't do much real-time collab on documents at the same time with other folks on my team, so I can't attest to that - though I hear that Msft has come a long way here and the Fluent roadmap looks really promising.