Reviews of HITACHI high-pressure fuel pump

I ended up buying that evening a new Hitachi (original manufacture for VW) HPFP ($300) from Rockauto because they were significantly cheaper all the other suppliers. Then as I dove deeper I started looking for just the fuel pressure regulator or as Hitachi calls it the fuel pump flow rate control solenoid. I found one on amazon from brand X for $30 that had a 4 star review from 600 people but after saturday evening I could never find that listing again so on sunday I bought this one and it arrived today as well as my Hitachi HPP0015 HPFP. I installed the $30 regulator in my original HPFP and its been working GREAT for 2 years now.