I've had a few vehicles with various limited-slip drives.  They're all a
big improvement over a standard vanagon's type of differential,
significantly improved ability to get going and to keep going.  I am
planning on adding something to my 5sp when the time comes, probably a
locker, as the various LSD's all behave differently. I tend to favor manual
controls and I normally have little trouble maintaining momentum in mixed
conditions, but getting moving, especially after being stopped on slick
hills, my van won't go