One week and two days after ordering from Elecrow I have received the PCBs. They look great. I really love how thin they are, 0.6mm, and I love the castellated vias. I found it very easy to order. I did not have any human contact with an PCB manufacturer engineer. I chose for 24 hours production time and 2-3 business days shipping. In addition I ordered a solder stencil. All in all about 80 USD, which is very low when compare to for example EuroCircuits. I should have instructed Elecrow to write a low value on the package because I had to pay 50 euro import duties and taxes. My bad.