ANyone knows the effectiveness/characteristics of this style? And where one can learn it?

Scott Rodell teaches in Washington DC. See: http://grtc.org/

You might also try the American Yangjia Michuan Taijiquan Association (AYMTA) at: http://aymta.org/

There are schools throughout the U.S. (Robert Politzer in N.Y.) and in other countries. Where do you live?

Does anybody have any personal experience? Could somebody who has seen Yangjia Michuan practitioners give his opinion?

I have practised both the Wu style and Yang style simplified form and I've found the Yangjia Michuan practise to be the most complete system-There are a series of basic exercises which are practised before doing the form as well as a number of push-hands basic exercises.the form is complex but with practise quite accessible,especially if studied along with push-hands.Interestingly the final part of the form is practised on the left side which I have not seen in other forms.When practised in its entirety the form takes an hour to complete.Other sword and fan forms are practised along with Neigung.

For anyone interested in learning Michuan Style, 13 kinetic Movements Tai Chi, you should come to Kalamazoo to the Kalamazoo Chinese Martial Arts Club. Master George Ling Hu teaches 2 workshops a year there. For further info you can email me at rmartin6@neo.rr.com and I can direct you how to contact Mr Hoff for the workhsops. Also this style along with Ba Gua and Longfist is taught at the Richland Karate Center in Mansfield, Oh by the Purple Bamboo Institute. Contact me for further info