I usually don't like to rate a device badly when I get a single faulty device when it can easily be replaced, but I ended up with two machines, both completely useless.In the first case the machine Bluescreened before I had installed anything. That was a bad sign. The machine kept having threads lock up in various apps, with chrome Windows becoming completely useless and the simple games I was running (some 2D stuff that wouldn't tax the computer) completely going black. I tried to upgrade a video driver and the machine stopped booting, and the Windows repair would also lock up after running for a short time and then the machine was completely a brick.In the second case the machine became absurdly slow within 20 minutes of starting the first time. Chrome was the only app I could install before it was useless. It took minutes to get ProcExp open to see if there was anything running but there was no evidence of disk, network, memory in use. I let the machine sit for an hour and it got worse. I rebooted and the BIOS menu was slow! And trying to run the Windows Installed from a thumb drive was slow and also didn't recognize the disk and the mouse so I couldn't install (there are no disk drivers listed on the ASUS site). I let the machine power off and came back in a couple hours and it ran fine for a few minutes. Within a half an hour it was slow again and a few minutes later I couldn't even boot it. Seems to be a heat problem.That's two machines and two faulty pieces of hardware. I have had good experience with ASUS but I wouldn't trust another identical machine.One side note - The tablet mode doesn't fold right. It's a little spongy and stays open unlike a different ASUS tablet I have. It made it far less appealing as a tablet. That and the whole not running thing.