Yes, I've tried it. The nasal patches cover the nostrils and are designed to allow for unobstructed inhalation while partially blocking exhalation. This backflow of air causes the breathing passages to remain open.
They take about 5-7 days to get used to and you have to be diligent during this acclimatization time (in other words, stick with it).
I've used them on the Appalachian Trail, Lost Creek Wilderness, vacationing overseas, etc., however, these type of trips are the only times I use them (plus about 4 days before a trip to get used to them again).
I hope to get a sleep study done this year while usIng ProVent and then decide if it's an all-the-time solution for my particular situation.
I suggest downloading info from their website and taking it to your doc since its still pretty new and they may not be aware of it. If your situation is appropriate by all means give it a try.