As we didn’t want to wait for professional PCB assembly, we assembled the first batch of 35 OpenPCR boards ourselves. It took some time but came out decently. The biggest difficulty was soldering the H-Bridge IC, which has three large power connections on the bottom of the package, plus fine pins all around it. We managed that by effectively doing reflow soldering with solder paste and a toaster oven, and then soldering the through-hole components afterwards.
As much fun as that was, I’ll let a pick and place robot do it next time. I’ve been looking at Screaming Circuits for PCB assembly in the ~100 unit range, though please feel free to suggest any other companies in the comments.