Great build quality freely very solid
Basic controller is very good
Overall a better unit than the maxspect gyre
Would highly recommend

I have two CP-40's for a 4ft tank, in reality, a single unit may be enough.

The build quality is good with the pumps feeling sold and well put together. The controller is a little plasticy however.

Forward flow is impressive, I am currently running at 20-30% on W3 (reef mode). The flow builds, so if left in Gyre mode, chose a low setting - these are powerful pumps!

Reverse flow is weak compared to forward, I understand this is common with pumps of this type. However the change in direction of flow releases an impressive amount of detritus into the water column.

The rotors are quite small, I have not been able to remove them from the carriers to inspect more closely, however they look solid enough.

The only downside so far has been the lack of integration with the Apex controller, which I can currently achieve with the RW pumps and Jebao/Apex controller.

Hopefully this will be released soon as currently the Cross Flows are NOT compatible with the existing Apex controller