I have just received the PCB board and most seems fine, here is a live demo,

However, as I am a "stingy" person and do NOT wanna pay $10 just for the castellated holes, my DIY castellated holes does not come with the smoothest finishes, in fact, some of the outer half holes already got the copper layer torn off during the machining, but according to my visual inspection, those are still good to use. 

Also, I forgot to measure the board width, so at the moment, it's not entirely bread-board friendly, this will be fixed in the next version