I like it a lot.
Years ago I designed a database where I plug in the bad guys and I get little half-page blocks printed up. Everything is in the same place on the page, but it takes some getting used to, and doesn't work for every situation.
For my current adventure, though, I have typed up the monsters in the new statblock style, just to try it out. And by Jove, it works! In the middle of a fight, brain muddied by fatigue and beer, I can pluck out the info I need without hunting for it! It also has important stats spaced apart (e.g. hit points up high, ability scores much lower), so that you can keep a running tally of how things change, without running out of room and getting lost. I'm enjoying it, and it has a much easier learning curve than I had anticipated.
I would love to adapt my database to automatically generate these new blocks, but I haven't figured out how to do it on the report yet (make fields appear or disappear according to whether the entry is null).
I'm sold on the new statblock. You guys just have to try it for a while.