I used dental devices for 3-4 years...worked good at beginning, but I really had to crank it to open my airway. I had alot of fitting problems, and usually had to be a new one every year.
BUT at the end....my over byte became an under byte and I got braces to fix them....2 years of braces and im over 50...sure it was funny to everyone around me. I might try the tongue suction one sometime...but I just reverted to my APAP when needed.
I would suggest to try it but keep a watchful eye on your teeth position....at then end I couldnt chew steaks anymore...but everythings back to normal now....after spending $5K on the braces...;P .