I've used Zeovit in the past without issues. However you must maintain strict parameters (within the range specified by KZ) or else you can lose corals. It is a system that needs daily attention; pumping the zeolite stones and dosing one or two of the products eg Zeostart on a daily basis, Zeobac 2-3 times a week. Other times 2-3 times a week you need to dose some of the colour enhancing products.
It is a system that requires patience and careful observation.
There are a few members on the Zeovit forum who will advise dosing schedules etc for you. I've been a member there for some years.
However, me despite being from Europe, I prefer the American taste in how SPS corals should look; deep strong colours. The pale and thin tissue appearance is not my thing.
I have used a modified version of the system on my current tank at the start to reduce nutrients and it works extremely well.
Lastly, depending on tank size, at least initially, it can be very expensive. The products however, are mostly very concentrated.