Coming over from windows to Mac. Like lion so far except the hiding dock and menu for full screen. This would be better behavior for a tablet but not a PC. The sit down and get work done computer, I prefer to multitask at high speeds without interruptions. This hiding menus and docks is like loading groceries into an unleveled refrigerator. The door keeps closing on you as you are trying to put food in. You end up dropping the eggs. The menu and docks keep closing as you are trying to do some work that requires switching between apps frequently.