>>351033256
Make sure the straps are in good condition.
Other than that you need to play with it to notice stuff. Make sure you don't have stick drift (your player moving slightly sometimes without you moving the stick). Make sure the capacitive touch on the sticks are working (sensing whether your thumb is on them or not). Make sure the finger tracking is working in a game other than VRChat. Make sure the headphones don't vibrate with loudish, deep notes. Make sure there's no pixels flickering around when looking at dark things/in dark scenes or audio pops as that means the cables dying.