Native client would be best, but at least a web client that does everything is a must for serious work. By everything I mean at least: offline work, easy back-up of my database, and, well, all the features of a windows client -- randomly I found, that one cannot link from one note to another, except in windows client. I paid for the premium account, but, frankly, I don't understand what is the advantage of Evernote over, say, Google Doc. I start to realize, that it is probably just a gigantic hype, so will probably migrate my notes elsewhere, before the bubble bursts.