Summary: Got the top of the line model with 2 SSDs in December of 2013. In September the first SSD failed and I sent it in for repair/ replacement. A month ago one of the two SSDs failed and yesterday the second one failed. We'll see if they repair it again now that it's out of the 12 month basic warranty. This is my second ASUS and the second one that I had to send in for hard drive issues.
Summary: Supplied activation code for Windows does not work, so have to purchase a valid activation code. Was unable to contact anyone about issue short of returning item, great product but be prepared for aditional cost. As stated it does not come with manuals or anything but the windows activation code sticker was on the underside of laptop and did not work with installed version of windowd
Summary: I bought this product based on its reviews. It's a nice laptop... when it works. I'm not sure if it's due to build quality or due to the incompetence of ASUS' customer service, but I ended up sending it back 3 times in less than a year for the same issue. Either the hard-drive was failing, or the RAID controller was faulty.
Summary: Very good Windows 8.1 touch screen. Very fast, reliable and so far problem free. My only complaint is a minor one; the touch pad is very sensitive and difficult to adjust to my specific preferences. Touch pads on both the MacBook Pro and Toshiba Kirabook are supior in this regard, but otherwise the Zenbook is competitive with either, and has a slightly better price point.
Summary: worst laptop ever!! At first, I loved it due to the sleek design and speed. However, ~4 months after purchase, It spontaneously went into the BIOS menu and wouldnt exit. I tried everything that was suggested online and by experienced technicians. It also corrupted the hard drive (which consists of 2 SSD drives-making it super difficult and expensive for any type of data recovery).
Summary: I bought an Asus UX301LA six months ago. Recently it began to blue-screen one or twice an hour with a KERNAL_DATA_INPAGE_ERROR. I believe the issue is related to power distribution and similar to what's documented here: http://technologicaltheologian.blogspot.com.ar/2012/10/zenbook-prime-and-unexpected-shutdown.html?