I have one in the rear of my truck. While it's not my DD, most of my driving is on-road, unfortunately. <img src="/forums/images/graemlins/cyclops.gif" alt="" />
I do notice that the turning radius is worse when I have power to the wheels, making the lockright engage.
Other than that, no complaints from me.

Todd

1986 Pickup extracab longbed "Woody edition"
SAS - 33's, 5.29's, lockright rear.

02 IS300 SportCross - my "DD"
94 2wd v6 extracab
04 Outback Wagon- wife's/family car