Four Brothers was one of the vetted companies suggested on Reddit that I came across, and it was one of the few that had a holster variant for the EZ 9. I was pleased with the amount of choices I could make with the materials and colors, and the explicit instructions on how to care for it. They have a YouTube short out there that talks about what loctite to use based on your use case.
I've carried it a bit already (kidney carry) and it has been pretty comfortable. The holster allowed me to play with the position on my waist, and tweak the cant.
After reading the guide in the listing about carry options, I ended up with a wing and the DCC clips. The clips are incredibly stiff, and give me pretty good confidence that it won't come off.
All in all, I feel confident on the quality of the build and the materials used that I will likely buy again with my next pistol.
The holster works perfectly. I love the retention screw. I had a foot pursuit the second day I was using the holster on my outer carrier and running through open fields and and into a thick treeline at full sprint was no issue. Not even a rattle. Highly recommend. For the extra $20 from the closest competitor, which I did try first, it's well worth it. Awesome customer service as well. Got a phone call after placing my order to confirm I needed Molle attachments. Just buy it and you'll be good to go.
Compact, solid materials, with great retention
Ran drills with it, drawing was clean and easy from IWB
In a perfect world it would audibly 'click' when fully holstered but other than that great buy
Great holster, good retention, easy draw and register. Looking forward to giving it some more usage and seeing how it continues to hold up.