I have the Apple in-ear earphones and I love them!
They do not fall out of my ears and I think that has to do with selecting the correct cushion size for your ears, also selecting the right size has a definite impact on the sound quality and may I add that this is consistent with all in-ear earphones.
I have owned various models of in-ear earphones before these and I would say that they are amongst the most comfortable I have owned and definitely an improvement on the older Apple in-ear earphones which I still have and which do have a tendency to fall out no matter what size cushion you select.
The sound quality is excellent, a really flat honest true sound that will playback sound the way it was recorded with no massive bass or any distortion which many of these types of earphones are prone to do.
Q-1. I live by the ocean and I have had these earphones for about six months and have not noticed any signs of rusting - to be honest I don't think the materials used can rust.
Q-2. They are very easy to clean and you can screw off the metal mesh caps quite easily, replace them with the spares and then clean them (I leave them overnight in a cleaning solution, then rinse them off and dry them out and store them ready for the next cleaning)
Q-3. I find them to be very comfortable and often use them while I work on my computer some times for up to four hours with no complaints.
I highly recommend them. You will be hard pressed to get better sounding earphones for $79 and the added bonus of the remote with mic is great.
