Because TOBI is class C (I think) for pregnancy, my doc and I decided I will do Cayston during my pregnancy (it is class B). It arrived yesterday in all of its glory (two boxes including the meds, new neb, baby bottle sterilizer, dish soap, containers to wash in, etc) Kind of impressive and kind of intimidating. I am excited to see how it works since I suspect I have some kind of resistence built up to TOBI. Any comments on its performance relative to TOBI from any Cayston users? Should I expect a bump in lung function like I did when I started TOBI?