Yup. I’ve done two beta tests for Anker products. They were supposedly pre-release versions, but both were pretty polished products.
The first was the Soundcore Strike 3 Gaming Headset. This was especially polished. Even the packaging looked like it was production ready. And I had zero issues with it. I didn’t do a whole lot of testing other than using it 10+ hours. I gave mostly positive feedback. The linked review came weeks/months after the testing ended, and this was 100% voluntary (not part of testing).
I am in the middle of the second test. Per NDA, I cannot discuss the product until it is released. I am doing a more thorough testing on this: complete functional testing as well as some load testing. I already filed multiple bug reports on it. Once testing is over and the product is released, I’m sure I’ll write a review for it (again, not a requirement).
But yeah, I agree with most here that the “We Love Testing” products are meant to be more for generating positive reviews whereas the beta testing is meant to hammer out bugs and improve the products.