Just as a counter data point, I've never lost a note and it's been very dependable for me for at least 5 years or so. Still makes me nervous though now and then.
But if you're worried about it you can set it up so that it keeps a local copy of your note library as well, just in case.
But if you're worried about it you can set it up so that it keeps a local copy of your note library as well, just in case.