The LG Nexus 5X launched at the same time as the Nexus 6P and was Google’s idea of what devices would be showcasing the Android 6.0 Marshmallow update. The 5X is the baby sister to the much larger 6P (6 meaning 6.0 inches in size).
There are mixed reports about the LG Nexus 5X and its quality. Some argue the build quality is poor and that is flexed far too easily. Others are very content with owning this device.
It is part of the official Google Nexus range of devices and will always be looked after very kindly with future software updates. You can book this one to be at the top of most lists for future Android OTA updates until the release of the next Nexus device takes over as the quickest to receive them. Even then, this Google LG Nexus 5X won’t be far behind.