It's free of charge, has good performance when using the website or api, I can find what I need quickly with ease, very helpful! There are some things that make me feel uncomfortable to use the service. As an example, if you publish a new product, there should be other people who have published before that will come into play so as not to be too different from those competitors' products. At least I did not receive any feedback about this problem but maybe others do? Not much more than that.
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