Depending on what's the size of your screen, the space between app menu and menubar apps is sufficient to see all menubar apps or not. With a giant display of an 27" iMac or a large display of an 17' MacBookPro the menubar normally is no problem, because the screen is so large that there is every time enough space between app menu and menubar apps. But if you have a 13" Macbook (Pro | Air) with a resolution of 1280x800, most time some of your menubar apps are hidden by the app menu. And with Murphy's law: If you want to use a menubar app, exactly this app is hidden by the app menu. That sucks.