I am the same, how have you found MS OneNote? I have it with my Office 365 subscription but havent used it.
Have you managed to export Evernote notes in OneNote and have you found any downsides? I considered this when my employer stopped paying my Evernote premium subscription, on a basic subscription my main bugbear is the limit of no more than 2 devices (I think EN have even counted a web instance as an additional device in recent upgrades).
I couldnt justify a the cost of a premium subscription to use EN on 4 devices. I know premium is more feature rich but in all honesty I dont use the additional features other than additional devices.