Anyone order Powerlung?

Has anyone ordered the powerlung from
Could they give a detailed review of results, tips, etc.? Thanks! (also, anyone use it in conjunction with TAKU's interval training?)

Opinions vary on whether or not this is a valid form of training to increase performance. Personally I don't believe that the mechanics involved in restricted inspiration and forced experation aid in athletics. But, even if you do think it helps then it is still a waste of money because you can just exercise with a straw in your mouth and get the same action.

Best in Health and Training, J. R.