There are probably few features that would be considered critical enough to stop using evernote, except maybe syncing and lost data. All other features will add up to either continuing to use the program in spite of the issues, or not using the program because of the issues. It is more of a cumulative effect than a single effect. Most likely true of windows users, of course there would be exceptions for people that tried to use evernote for a specific purpose for which it does not work. This is critical to my not using certain features, I will not use the doc feature, will not use to take pictures of products to be printed later, will not take pics of serial and model number plates to keep in evernote.