It is great tool. It felt better today, as I force myself to with a lesser breath one "ones" followed by a standard breath one the "two".
It will need quite a lot more work for me for the rythme to settle in but I actually think I may be able maintain close to pure 2:3. The first breath has to be tiny enough to mostly completely exhaled though the nose before the "two".
Taking overall tiny breaths made those breaths short /quick, I could feel the impact on my alignement on a couple moves then the feel slept BUT it motivates mee to keep walking that path some more :)
WHereas I'm more of a natural breaststroker I start to really enjoy front crawl and its feel when things start to come together it is indeed "smoother".