I have bought many things from amazon.de with success. The delivery and tracking is great. The price, selection and quality is often (but not always) good. Overall, I am happy with amazon.de, but a few things annoy me:
1. Even though I have an account based in Denmark, prices are shown with German VAT so it is always “exciting” to see the real price which is not discovered until the final checkout steps.
2. Some items cannot be delivered to Denmark. I suppose that is up to the seller, but the typical message is “choose another delivery address”. That is not really an option.
3. In a few cases the delivery cost is wrong (e.g. advertised as 0.01 euro, but turns out to be 8+ euro on checkout). I wrote a review about that which was deleted since it was “not related to the product”. I therefore no longer contribute with product reviews on amazon.de.