Wiznotes is a sleeper, discovered here. Maybe the best, putting aside the China Syndrome.-Steven Avery
Not exactly an inconsequential consideration these days. Having something written and hosted in Communist China is almost as dangerous as parking it in the USA.
Onenote, again dunno, how is the cloud implemenation.
I personally think OneNote is vastly overrated. But it's a paradigm thing with me. How a big sloppy freeform notebook helps people keep organized is beyond me. For creative use, brainstorming, a junk box for rough notes and snippets...possibly. But for keeping a complex project on track? Not my idea of how to do it.
That said, the web implementation actually isn't bad. OneNote is one of those things (like Outlook) that seems to make a lot more sense with a big web-enabled server standing behind it. I use OneNote (reluctantly) because some of my clients use it. They're real diehards who put the time in to master all it's little nuances and quirks. (Of which there are far too many AFAIC.) But these same people are pulling down solid 6 and 7-digit salaries most of 'em (they run a private hedge fund) ...so what do I know?

Microsoft will give you a free 30 day on Office365 complete with all the fixin's. Best bet is to check it out and pound on it. For a certain class of business requirements, O365 is pretty hard to beat. If you don't fit the model of the user Microsoft went into it with, it's another story. (You really can't customize it easily. And some parts you just can't. Period) But if you're one of the business cases Microsoft designed Office 365 for, rest assured it will serve you very well indeed. If you do subscribe, pay the extra to
get the plan that lets you install the actual Office software on your PC. That way you have on and offline capabilities. And it really doesn't cost that much more. It's $12.50 a month with a 12-month subscription. You can
pay up front or month-to-month . But month-to-month cost $15/user if you do.