One thing they didn't evaluate was sleeping partner quality of life. I know my Somnodent G2 oral appliance has made me a much nicer person to sleep beside- much quieter, less snoring.
I have mild sleep apnea, mostly a noise issue! So, I didn't seek out assessment and the device for me as much as for my husband. I can't say I felt more rested because that wasn't the main issue.
Now that I am 3 days without my device (had to go for repair as a wing cracked and needs to be re-glued), I'm on the couch and notice a sore throat from all my snoring!!!
Nice to find this group. I have many friends who use Apnea devices (mostly CPAP), and some who are exploring the oral device option too.