Today I received my Advanced Civ cards and overall I'm happy with them. The cards are a bit thin but the printing quality is excellent. The advancement cards came out a bit blurry; that is due to the graphic I used and not their fault. The time from placing the order to it arriving in California: Order placed July 6. Received July 13. I was expecting a much longer turnaround.
If I do any more print and play games (Like 18xx kits) I will definitely consider using Artscow.
Here's pics of the cards. The trade cards turned out great. The advancement cards could've been better. It wasn't Artscow's fault, it was the graphics that I used. You definitely need higher resolution scans to create good set.