First things first, all the .3 to .7mm vias have no measurable resistance (measured with my cheapo multimeter). Other than that, there are a few things wrong with this board: The CNC router shut itself down in the middle of a drilling cycle, and after that, the Y axis was slightly off, so the .8 and 1mm holes are all in the wrong place. Also, I printed the film the wrong way around, but I didn't even notice until the board was etched.

This is a 1.6mm board, which makes the aspect ratio of the 0.3mm holes roughly 1:5. I'll have to figure out how to make a clean cross section of one of those holes to look at the wall thickness, but still, that's quite impressive for a bottle of battery acid and an old PC power supply.