Hello Johannes, I love the product! I just bought two cores! You asked for feedback, so I wanted to let you know that the order form doesn't ask for the state (province) if you select United States. I included my full address in the comments, but you might not be able to ship another package to the US if they don't include the state. You can infer it from the zip-code, however, so maybe it's alright.
Regardless, top notch system integration.