Nice upgrade from my 5K+, however, the extra cost is a little steep. Paid AUD$2300 including the 6m optical cable.
Pro's > High Res, Wide FOV, SDE almost gone, powers directly from USB.
Con's > KDMAS needs a counter weight at the rear to balance the HMD better. I also wish the headphone cushions were wider so they would touch my ears. This would improve the bass and overall sound quality.
Conclusion: Besides some Pitool software hickups I'm really enjoying this product on my 5600X + 6800 GPU. Pimax is always improving their SW so everything is getting better all the time. Love the new Pimax VR Experience GUI, so a big thanks to Sweviver and ArtArmin.
If you have the cash to splash it's an awesome HMD otherwise the 5K+ offers great value for money if your budget is tighter.