I've been sour on the nub since I got the system but I'm having issues using it in majoras mask. Sometimes it feels unresponsive, especially when trying to pan the camera up or down it just moves a tiny bit, and has made me question how I'm supposed to be using this thing.
Do I rub my thumb across the top? Do I press along the sides? Does pressure down on the edges affect it? I feel like I'm pressing on it pretty hard sometimes, and I also try using my nail to press on the top edge to pan the camera down but I feel like that is going to damage the rubber over time.
2 & 3 still hold up really well, though terrible combat has always been terrible. Some people think it adds to the tension though. Just don't get the 'HD' versions if you can help it, there are some broken and very questionable things.
@lunnington: I had that issue when I had a 3DS which is why I upgraded to the XL, and now to the new XL. It was much more comfortable in my hands with them being further apart and resting more naturally in my palms. Both XLs are the same size and shape so either should solve your issue. At least it did for me.