Sorry to hear that. Mine are still in one piece but I plan on replacing them with Aisins soon. I bought mine before they got real expensive, but they are not a quality product. Sometimes they engage, sometimes they disengage, sometimes the seem to get stuck halfway in-between. I'm not averse to maintenance, but I shouldn't have to disassemble and lube the locking mechanism and splines a couple times a year.
The Warns are better, but there are still stories of them failing. I think if you can, Aisins are the way to go.
@Philndz, your call on whether to install them or not. There are a lot of people using them and relatively few failures, but don't think that Robert's and Inc's experience is isolated.