I don't know if they changed the jelly bean button design at all from the 3GS design but they should have. I have the 3GS and love everything about the case even the jelly bean button except for how it works. Sounds weird, right? The jelly bean button itself isn't the problem. It feels good and looks cool but pushing the button is way harder. The problem is that the iPhone home button is concave and the jelly bean button is flat so there is nothing to make easy contact with the iPhone home button - therefore you need to push twice as hard. I really believe that is the issue that people complain about in relation to the button. For me I was able to make the case perfect by putting a tiny piece of sticky tape under the jelly bean. You cannot see it and it gives just enough more to make the jelly bean make contact easier, therefore resulting in a nice easy push feel. I've written to the folks at Switch Easy that they can correct this issue by simply molding the inside silicone to protrude a bit under the jelly bean button.
Long winded, I know but I feel this is an awesome case except for the hard button pushing issue. Hope the Switch Easy folks correct this design issue and they will have a perfect silicone case.