I have the 270 Suiboku white 2 (Tanaka forged, at least from that workshop). Haven't put it to any real challenge yet, but so far great knife. Feels nice and balanced, less light than I expected. They run very short, the 270 is actually 250x50mm, the length is perfect for me, and the height is perfectly acceptable.
Super well made, the finish is gorgeous in person and very well done. The knife came with one of, if not the best OOTB edge I have experienced for a Japanese knife. Moved through food easily, but will know more when I get some fresh hard produce.