Here are the pictures of PCBs that arrived few days ago. Since these are the first PCBs that I ordered from OSH Park, I decided to inspect them in detail under microscope. Gold plating on copper is smooth, evenly distributed and nice to solder on (tried test soldering few components on one PCB). Silkscreen is smooth, "high resolution" and looks way better than on Chinese PCBs (Chinese mostly use dot matrix printers so theirs silkscreen looks "pixelated"). Only downside is that solder mask isn't perfectly aligned with pads, but that wont be a problem.