This is my third set of XT/XT2 mounts, and the first from this brand. These are have a nice clean design, and fit the device perfectly. They are relatively easy to install, but please make sure you try out the positioning with the camera in the case before you drill screws in. Because the camera case screws onto the base unit, the position of the base unit will limit to some extent how much swivel movement you have - so figure out the correct position for the base unit before you drill the screws in.
Can’t speak to the quality of the weather-proofing yet, but if they are anything like the others I have bought, hopefully should hold up to tough winters as well.