I thought i give my thoughts on them.
I had order my wheel just a day before their golden week .. Zara team work around the clock to get my order up as i was due to fly overseas to cycle.. and they did.. but i had to postpone my trip due to the typhoon hitting Taiwan.. but i have been putting some serious mileage on them and they are holding up pretty well. Mine is the version before the ultra light weight version.. its about 1017 grams.
fast forward to 2 month later and i had the opportunity to visit their factory and of cos their cold storage where they kept their prize Toray material. We spend some time discussing about Zen Wheel future development and i would say it definitely worth giving them a try. they are much smaller scale compare to some of the others factories so the range of rim SKU might be not exhaustive but whatever they have right now should cater to our needs and the attention to details and quality is decent.. to give you some context, i had been using light bicycle since 2012 and farsport wheel for a long time and working with Zen....i would say they just as good.

You can't really tell anything from that photo. Did you try to make a video showing the hollow(?) portion flexing or anything?

Weirdly enough, just returning stuff is often way easier than getting a fault acknowledged.

u are right actually. the seller try to ask me to change my request . n not put as damage.. then  after 4 day. Aliexpress still came back n ask me to accept 16 dollar instead of accepting my request for return n refund....