The sound quality is really good, and the active noise cancellation performs very well. However, within just seven days of buying it, the left earbud accidentally fell from about waist height onto the floor. It wasn't a significant drop, but I noticed that the seam where the two parts of the earbud are joined slightly opened up.
Because of this, I'd say the overall build quality is only average and could definitely be improved. Other than that, everything works well. I would recommend handling the earbuds very carefully, as they seem quite fragile. It's disappointing that such a small drop caused the casing to separate.
Although it's still working, I may have lost the IP rating because of the gap in the casing. The sound quality and active noise cancellation could also be affected over time.
Overall, the audio quality and ANC are excellent, but the durability and build quality need improvement. For a product at this price, I honestly didn't expect the build quality to be this poor.