I HATE these big phones, but...

[novice]

I use my Note 5 almost totally for my legal business and the ability to take notes with the Spen without unlocking the phone is an important feature. Being able to use the Spen to take screen shots, and select portions of the screen to make a screen shot is also very useful.
Dump google docs etc. and load Office and Office Lens and get a Office 365 subscription good for a one phone, one tablet, and one PC or Mac for under $8/month. Now you can create and edit docs, spreadsheets, etc. that are NOT like Office files -- they ARE Office files on all three. Office Lens allows you to scan documents which are automatically framed and straightened. You can save these directly as PDF files or JPG images. The Note 5 also lets you run two apps at once in a split screen so you can interact between the two in real time. Quite simply there is no other smartphone that can do business work like the Samsung Note.
As for size, after using it for a short time it becomes the perfect size and you realize that it fits your hand better than other sized phones.

I'm a lawyer and use the Note 5 extensively in my criminal practice. From notes to photos of exhibits and in-court diagrams.

I'm old and decrepit with the result that I still use WordPerfect. I've given up on them ever bringing out a version of this application for android. That's the only real downside.