I have had one in the front of a GQ for 120,000ks & in the Wrangler for 20,000ks. I have never had any kind of issue on or off road with either vehicle. I am replacing the Wrangler one with an air locker, but not because it doesn't work well, I just bought one as part of a ratio change.
BTW the Lokka will be available for $275 in about a month.