I live under a flight path and have tried pretty much every kind of earplug there is - foam, wax, silicone, lamella, you name it. I can honestly say these are the most effective and reliable I have ever used. I have found that most types are fiddly to put in, tend to fall out during the night, even if wedged in so hard they hurt, and are basically uncomfortable at the best of times. These however always stay put, and are comfortable to wear - yes you are aware of them in your ears, but much less so than most types - there isn't so much of a pressure feeling. I find with daily use a pair lasts about 4-6 weeks, they are still usable after this but they seem to get a bit less soft and with not quite such a good seal. Of course I'd rather sleep with no earplugs at all, but failing that these are the next best thing.
Very highly recommended.