........................ you really never know with these products. You could get lucky and get a nice, working product.................
I am sorry but there is no such guess work involving happy thoughts.
Even this specific forum, it does include piles of negative reviews which translates in numbers that over 100 unhappy people they lost 100 times 15~40$ that is the sum 1.500 to 4.000 USD .
From the other hand they are among us anonymous Chinese citizens, trying to makes us believe that vast majority somehow will benefit from products produced at experimental phase by some robot arms in a dark room in China.
I am also a victim of good faith, regarding Chinese telescope accessories, I did purchase three eyepieces and a barlow, all unusable even for terrestrial observation, plastic optics deliver blurred image full of milky white reflections, identical to 3$ binoculars made for kids, and I lost approximately17 dollars USD.
Then I though to pay more, getting at 30 USD range of products, and a Chinese person admitted that the eyepiece that I was looking after, even this is poorly made, full of geometry distortions.
I will say ENOUGH with testing and collection of experiences due experimental products made in mainland china.
Our next buying experiments it will made after 2025 when Chinese industry mature enough.