We use every Fire TV we review for at least a week. During that period we check to find how easy it is to set up, how intuitive its UI is and what its app selection is like. During the test period we will see how well it performs running a variety of different content types. Where applicable this will include content mastered in various HDR standards and resolutions.  We will also monitor how stable the device’s Wi-Fi connection is and reliable its voice command functionality are where applicable.