Voice over with 3rd party head phones
I'm using the 4G shuffle with some in-canal Sennheiser headphones and have no problem with the voice over. These phones don't have inline volume control though. I've never used the apple phones.
I've had it since release day, bought for a diving holiday where I didnt want to take anything much bigger on the dive boat. For the most part it works great... however I've had 2 problems with it:
1. When loading it up at home before leaving I turned on the facility to compress tracks and then selected lots of playlists to load on to it. I left it running over night and in the morning it reported that it was fully synced. It wasn't till I was on hols that I realised that a lot of material just didnt sync. I'm not sure whether that's because it wasn't done when my computer slept after 5 hours or due to some other error. I plan to test again.
2. One time on holiday after pressing the voice button to get the list of playlists, I accidently pressed it again. At that point it just went silent. I couldnt get it to respond at all. I tried all the tricks I knew for resetting an ipod to no avail. Eventually I put it away. The next morning it was functioning again. I have no idea what happened.
Apart from those two niggles I like this suffle. Smaller than my 2G shuff and the ability to have playlists on it. It's also great with podcasts. If you interrupt a podcast to listen to music it will start mid-cast when you return to that podcast playlist.