"I have been using the o2 trainer and it has been great to use, noticed after first week huge improvement in my cardio that now when I do physical labor in the oilfield I do not feel as winded. Heard Mr. Rutten discuss his product on Joes podcast when he was on and thinking of making it. Just made me eager to try it out, after hearing of his asthma attacks and knowing people with similar, but not as bad conditions, knew that he put alot of thought into his product. Great guy looking forward to Here Comes The Boom and watching Inside MMA. Much love and respect for Mr. Rutten. powerful"