Hi onesome, I haven't tried it yet, but it does look easy - I did read on the German forum that somebody had used washing up gloves to open it, but I cannot find that message again (I use google translate, which makes it cumbersome) - having said that, Pocketgoods have put this video in teh
German forum:
http://www.youtube.com/watch?v=UuXrHwy59Ac
In practice you create a sticky sleeve with tape, which you then slide open - the "button" on the back isn't really a button (i.e. you cannot really press it), by the way (again, read soemwher onthe German forum), but it is useful to get some grip.