The filter element is somewhat "fuzzier" than any of the Bosch, STP, or M1 units, though not as much as the Honda (US-made) media. I'm not sure how much this might deteriorate over time. The poor sealing of the plastic bypass would likely result in some continual bypass, and after only a few minutes of playing with the valve I was able to get it to stick open. This bypass design would appear to be very poor. My primary concern with this filter are the cardboard end caps- I would be suspicious that the cardboard would deteriorate over time and may come loose, especially considering that the cardboard is in the way (partially) of the oil flow. I would be particularly concerned about this in a racing environment where higher pressures are common.
Also, this valve is of the same design as the "Extra Gaurd" above, with the same flaws. This filter would logically provide better filtering due to increased thickness and surface area, though the thicker material may only result in more leakage through the poor sealing of the bypass valve.