First day in use...
It has good fit and support,
does not bother the forehead,
fits on a Resmed machine, although it would be good to have the white-short flexible tube
that is not included in the package and was included in another code of the same brand's nasal mask that I had bought.
I bought it as a trial
to see the experience with the Oral Nasal Mask
since nasal and other masks did not suit me.
I end up opening my mouth at night more times than I expected.
I will probably end up with an Oral Nasal Mask
although it is exclusively a personal matter of how much and with what type each person will be comfortable.
Anyway, if someone doesn't know if the Oral Nasal Mask will suit them, it is a decent and relatively cheap solution.
Update: It has an issue with the air vents which push the air into my eyes in my case