There's a lot of people that use them "secretly" because they don't want to be called out for buying the cheaper fixture. I personally have an eshine fixture over my little nano, but it's new so I can't comment on the growth yet. I do have multiple reef club members using these exact chinese fixtures for 6months+ with no problems & solid growth.
I'm not advocating them, I'm just giving you the option without the "it isn't a radion, AI, etc. fixture so it's garbage" advice that is usually given to people new to the hobby.
90G Reef - in Progress
12G Nanocube - Nano reef
15g QT, 10G Frag