My husband bought me a Pari Trek last year. I wanted it for hiking trips and to use when we are out late and I need an extra xopenex treatment. I love it, it works great for what I need it for. The directions say not to run it longer than 15 minutes at a time because it may overheat. So I guess you'd have to let it cool down between treatments. I would not reccomend using it as your only nebulizer, just as a backup or to take with you.
Andrea 32 w/CF