I have a 6 yr old SurfaceBook that bricked itself and I needed a replacement work PC (BTW, once the battery completely died in the SB, I was able to re-power it up again, but I've lost all confidence in it after both the lockup and a previous expanding battery issue). Excellent performance and value in the Yoga. Also, there is a removable panel on the bottom of the laptop's all metal case (secured by screws) which allows replacement of the internal battery. It is a DIY without much trouble. A few quirks about this one though. First, there is a bios option to leave the USB ports powered even when the laptop is off. This is enabled by default and you will notice a battery drain. Turn the option off if you don't need it. Second, there is a delivered "Lenovo Utility" app that will randomly kill your WiFi connection. Uninstall this immediately and you will have no WiFi issues. Fixes for both of these issues were found by Googling. Third, I needed to adjust mic sensitivity when using a headset (phone earbuds/mic). Fourth - there is a sliding cover for the camera that is closed by default from the factory. It is a little hard to see, so use a flashlight the first time you use it. After that you'll be able to use it by feel once you know where the shutter slide is. Actually a great built-in feature! None of these were deal breakers. Every PC is unique and takes a little time to get set for individual users preferences, and other than the WiFi issue, that is what the above were. As far as the negatives: No SD card slot. You'll need an external card reader. If you want to hook up an external monitor, there are only 4 USB ports on this laptop (2 old USB, 2 new USB C). I bought a USB C to HDMI adapter to hook up my 2nd monitor. That's it. Great laptop if you can live with the limited ports. I would definitely recommend this laptop, especially at the sale price I got!