“Definitely makes a difference.
The user does say that they sometimes feel that their teeth/jaw have been pulled at overnight but the breathing overnight , and associated noise, is very different.
Only knocked one star off for the wearers slight discomfort.”
“Has made a huge difference to both my wife and my sleep, there are still occasions when I snore but is far less, only slight issue I have is it seems to have become a little out of shape since first moulded.”