Well generally that they are used with saucces by several memebers and unlike the Detroit locker can be used in either axle.
The ATB is not a locking diff, just a clever diff that limits the popwer to a slipping wheel, if one wheel lifts fully you need to use a bit of left foot braking to get going again.
IIRC Chuggaman had one, and Muddyweb also, in their front ends.
They are also popular amongst the track day cars, not as harsh as a LSD (not a massive fan of those either, 2.8i capri, steer with the throttle anyone).
As you've got it I'd say stick it in, I wanted one for my sister as she towas her 'van onto grass quite often but a Detroit was too severe. She's got ABS/TC now though instead.