The overall evaluation of Alibaba's product quality is good, but some products have quality problems.

This may be because Alibaba has many merchants and a wide variety of products, and it is impossible to strictly control each product.

However, if buyers pay attention to the product details and reviews when purchasing, they can still find many products with reliable quality.

In addition, Alibaba also provides some consumer protection measures, such as returns and exchanges, complaints and reports, etc. Buyers can use these channels to protect their rights.

In general, the overall evaluation of Alibaba's product quality is good, but buyers need to pay more attention when purchasing.