I recently subscribed to Evernote and faced all kind of sync issues with Mac Desktop App.
Sometimes I get duplicated notes, edits reverting back like 5 or 10 seconds later after it confirmed "All changes saved", and entire Notebooks disappearing.
Yesterday, for instance, I added 5 notes to a recently created Notebook. Out of nothing, they simply disappeared after 20 seconds.
Bad connection? I don't think so. I'm connected to my router via ethernet and checked download/upload speed at that exact moment and it peaked 800mbps. I guess that is enough for syncing text only notes.
Today, I tried adding some some bookmarks via the web clipper. After getting confirmation on the Chrome extension it was saved properly, I go to the app and where are the bookmarks? Waited for two hours and nothing.
Unfortunately, even though I find EN perfect for my needs, I'll have to unsub cause I can't trust a service that can't do the minium which is saving my content properly.