Great timing, I just discovered a japanese set like this, i wonder if both manufacturers came to the same conclusion, or if it's the same ratcheting assy.
http://item.rakuten.co.jp/i-tools/4989530610186/ The ones you posted are a good price, though i like the SEK's box ends. The video is kind of a useless review without seeing them be used on an actual flare nut with a line on it. I've found that with flare nuts, how close the fit on the fastener makes a huge difference on whether or not the tool will loosen the fastener or round it.