Good quality, perfect fit, clear instructions cannot fault it.
Not sure why EK are held up as a pinnacle of excellence, they are just another supplier, and certainly not the gold standard - plenty of companies match and surpass them in all areas of watercooling.
Infact, i cannot think of 1 area where they are the best.
They have just become the go-to brand over the years, there are better fitttings, blocks, radiators, tubing, fluid, pumps all made by different companies.