Here are my thoughts after a couple of weeks of use in the morning and evening. First, it's 10-15 suck & blows setting no. 2. Then the nasal mask and about 10 suck & blows with the mouth. My oxygen uptake is clearly better now. In the morning there are clearly more impurities coming out (dust, old cigarette residue, etc. appear as dark spots) when hacking up. My voice is stronger, especially when I do half of the blows with an easy sound. Of course, these are as personal as your own vocal cords, i.e. there will be differences in experience. I'm guessing, however, that the chances of good results are a heck of a lot better than bad ones.

I've slept better since I started using the device, and I also feel more refreshed. I used to be ashamed to constantly clear my throat around people, but now I feel relieved. It’s a good device, I certainly give it a ten out of ten. Good and easy!