This was my first time ordering from Smart-Prototyping.com. I was quite impressed by the speed they produced my PCBs. I ordered 75 PCBs with the following specs:

Max X-Dimension (cm): 15
Max Y-Dimension (cm): 15
Layers: 2
PCB Thickness (mm): 1.6
Copper Thickness: 1 oz
Surface Finish: ENIG
Solder Mask Color: White