The Aspire S5 was the thinnest Ultrabook around when it debuted, but to achieve such a svelte profile, Acer incorporated a drop-down "MagicFlip" door to access the Ultrabook’s ports. A dedicated button raised and lowered this drawbridge, which made a loud whirring sound. Even worse, the ports are in the back, making it uncomfortable to reach around to plug in a USB cable. Some ideas should never leave the drawing board.
More: Top 10 Ultrabooks