Here's another story regarding PCB manufacturer PCBWay. However, I thought I might be different and tell you of a nasty problem I've run into with them.
I ordered a small batch of PCBs to be manufactured and assembled by them. The assembly isn't all that difficult to do by hand, but I wanted to try out their assembly service to see how well it works, as I have some upcoming assembly orders that I need an assembly house for. After my boards arrive, I hook up the power input to 12V, and measure the 3.3V Vcc rail. Vcc was well above 3.3V, so I checked the LDO used to generate 3.3V. It should be a microchip mcp1703a. Here's the IC that pcbway supplied and assembled for me:
The mcp1703a should be marked with JKXX, not CS9H. At a very rough guess, I think they erroneously supplied an mcp1700t for U2. The mcp1700t has a maximum input voltage of 6V, well below that of my DC input. I've checked the BOM that I sent to PCBWay, and yes, it does specify an mcp1703a.
I've let PCBWay know, and will update this thread if there's any news, but in the meantime, I have a bunch of useless boards.
ps: yes, U3 is an attiny9.