Pimax support is pretty good now to be honest 
The tensioning wheel on the headstrap broke into a bunch of pieces. All they wanted was for me to send it to some address in Sweden, and a day after it arrived they gave me a FedEx tracking number for express shipping from Shanghai to Europe.

Nice.

If pimax used a different lens design and kept everything else the same they'd be the king in VR HMD space right now.