I must admit that when I first tried evernote some time back I was impressed. However, after a few hours of use it began to irk me! My biggest gripe of course being the subscription requirement if you wish to have the ability to lock the app. Of course I could just use Tasker or such to lock it, but the whole ethos behind an app that would require me to do that rubs me up the wrong way.
I suppose that if you're happy to have your notes easily accessible and can stay within the 50mb (I think?) limit, or you are prepared to pay the subscription, then you may like evernote.
But hey, maybe it's just me, I'm still looking for the *right* notes app. I've tried dozens ("simple notepad" being the chief contender, but boy is it ugly!) but keep going back to colornotes - which for me has only two real flaws: no image support and improper handling of text sent/shared to it. If those issues were resolved I'd quite happily purchase colornotes if a pro version were to be released.