please read my most recent blog reviewing my experiences with hillrom, if you go back in my blog a bit you will see my additional posts regarding the vest. I am VERY excited about mine and it takes the cake! Much better than hillrom.
I was not really excited about the study comparing mucous production of hillroms vs respirtech since the one I reviewd only had 8 people involved. I decided to try it anyway since 8 is better than none, the results were pretty consistent, and everyone here liked it. I figured it definately wasnt inferior and it sounded much more user friendly so that was enough to make me want it. I am now confident no matter how scientific and large scale a study they do they will get the same results.