I can almost bet for a certainty they will repair/replace it for free. They've been nothing but helpful when it comes to the problems with my sim. First problem I had was the Futaba adapter cable has an intermittent open wire somewhere, causing my Futaba xmitter only to work when I hold the cable a certain way. So they have sent me an entire cable set. Now I don't need them after exchanging the unit from LHS and a new set of working cables. But the customer support is there. Others have mentioned that it isn't Great Planes with the issue, it's Futaba.....the maker of the Interlink.
If you get a buddy box transmitter mated up to your Interlink then the "wear factor" is now gone. I don't mind using my DX6 box. If I'm right these boxes don't transmit when on the "buddy cord" so the batteries should last quite a while.

Like I mentioned, the conversation I heard by the 2 behind the counter at LHS leads me to believe they even know about a wide-spread problem with Interlink because one person mentioned if the word got out there would be a mass exodus away from it. Sounds like they know what's up!! I do think, however, that GP should step up and tell Futaba to correct the design flaw. Like one previous poster stated after opening his, some cheesy little piece of plastic should not be trying to restrain the force of the centering springs.

~Ron