ok, well i do the vest 20 min two times a day, morning and night, no I do not use the nebulizer, cause my respitory therapist said that while doing that your not getting all the med from the neb, while on the vest too, so he told me to do the neb first then the vest unless you have tobi then you do that very last after the vest. I have been using the vest for about 6 years say. not sure on the brand, didnt know that there were different brands.