We were making our way through Taipei's sublime metro system this week and what did we see on the side of the stairway? Why, it was a collection of iPad images, but rather than an Apple-funded advert, this was an Acer-instigated bit of spec sheet trash talk. The captions beneath the images read, in order: "no open operating system, no high resolution display, no Dolby Surround Sound, no Flash, no microSD, no USB port. Why do you want to choose this type of tablet?" Gracing the opposite wall was the tablet that ticked the "yes" boxes to all those items, Acer's own Iconia Tab A500 . Perhaps once Acer figures out the answer to its own question, it can stop overhauling itself and get back to the job of chopping the iPad's market share down to size . Check out the full ad in the gallery below.: Looks like there's a video ad to go along with the print campaign! Check it out after the break.