Howdy!
I've worked with the old-style Zen Oracle and with Harold Swash's whippy putter, but not with the new-style Zen Oracle or the Tempo Whippy Master that Mr Redman in Dallas makes.
The Zen Oracle shown on the website as the new model doesn't appear all that different from the old style, at least in terms of function. It appears to have a redesigned base that might make it easier to use, and perhaps has a different weighting scheme. To me the Zen Oracle is about training the release upward down the line. Some golf teachers and pros today emphasize a "release" that is a bit different from this, and I don't think near as sound as the Zen oracle. However, the limitation of the Zen Oracle is that its use should be restricted either to short putts (under 10 feet or so) or not to a hole at all. Longer putts tend to let the ball escape out the back as the putterhead rises UNLESS you restrict the backstroke. This restricting the backstroke has a terrible effect on tempo, and this bleeds over into many other technical aspects of putting.
The Whippy sort of putter basically trains the golfer NOT to use the voluntary muscles to accelerate the putter downward, and I teach that the golfer ought to just "ride" the putter handle down as the putter free-falls pendulum-like in gravity in a natural accelerating pattern into impact. The whippiness of the aid allows you to see when you are snatching the putter away from the ball or stopping it too abruptly at the top of the backstroke or snatching it downward at the start of the downstroke or decelerating or clucthing the putter as it nears impact -- all of which are negatives. But you won't be able to see this when you play. When you play, you will only be able to FEEL these negative effects by the waggling of the handle inside your hands from the snatching or abruptness or clutching. The whippy aid then is interesting but the focus is misplaced from feel in the hands to something visual. So, use the whippy aid if you like, but get the correct message from it: a flowing stroke both back and thru stays very close to gravity's own tempo and you monitor this tempo with the feel of the inside of your hands on the handle, hoping to feel "nothing changing at all" in a good stroke. You can focus on this feedback in the hands without the need of the whippy putter.
Cheers!
Geoff Mangum
Putting Theorist and Instructor
PuttingZone.com
http://puttingzone.com
Golf's most advanced and comprehensive putting instruction.