i used red sea pro for a year and a half(no problems)
i switched to esv because of all the hype,after 6 months, got tired of getting out the scale and mixing everything separate.
I went back to red sea but using the blue bucket because i like the lower parameters for my system as it is now.
I can litraly be ready for a water change in 10 min, just add it to rodi,no scale,no waiting for each component to mix (faster that esv)