It is absolutely disappointment. First of all, you can not get rid of fool dock. it is like an ordinary web page javascript. Secondly, folder or application menus are located at the top menu bar always. it is changed by focused application. Thirdly delete function key is back key. it is very ridiculous not to have a specific key for delete operation. Double click to maximize forms and applications does not work too. While i was surfing on the web via safari, i saw kernel panic once. Even microsoft has solved such problems. apparently blue screen is the historical myht of microsoft now on. Shame of mac os!