For the , the top problem reported is battery life (35 percent), though touchpad errors come in a close second (30 percent). While you can't do much about the touchpad, short battery life can be . In of the X1 Carbon, we found the battery life to be decent, eking out about six hours and 11 minutes.

The 's top problem was poor screen quality (35 percent), another issue that can't really be fixed. The Timeline Ultra M5 has a 15.5-inch screen with a disappointingly low resolution of 1366 by 768 pixels. Owners also complained of a loud fan, heat, and too little SSD space.

Like the ThinkPad X1 Carbon, the Vizio Thin+Light's biggest issue was battery life (35 percent). In , we also found the battery life to be lacking--at just over five hours, it's a lot less than the six+ hours of other Ultrabooks. Other user complaints regarding the ThinkPad X1 Carbon included issues with the keyboard, slow performance, and Wi-Fi troubles.

FixYa's report also includes the Dell XPS 14z, but that might not even be worth mentioning, since Dell has discontinued that model. The biggest problem with the XPS 14z was the wireless card, which could be fixed with updated drivers.

The report also includes Lenovo IdeaPad Ultrabooks, but because Lenovo has four IdeaPad Ultrabook models the information is very general and may not apply to all of the IdeaPads. Again, the biggest issue there was Wi-Fi connectivity, which Lenovo has acknowledged, and which can be fixed with updated drivers.