Purchased the Pimax Crystal 50PPD pre-order edition that included the top strap and DMAS speakers. Overall, it has very good image clarity that is slightly marred by the presence of mura on the QLED panels. A second issue I noticed was that the colors on screen seemed to be a little washed out compared to other headsets I’ve used. The Pimax software provides some configuration settings that help offset this, but it’s limited.
The biggest issue was the included DMAS speakers. Both are very loose in the joints, which causes a buzzing sound when certain audio pitches happen. Almost sounds like an electric razor. Also, the DMAS bass is so overpowering that other sounds are being drowned out with no way to change it in the Pimax play software.
Other than these issues, the headset is pretty fantastic, and the weight is well balanced. I would recommend getting some aftermarket comfort mods to improve the experience.