Hi Don
We used a snakemaster for a number of years and it worked quite well at damping the side to side movement.Once installed they are easy to fit and use.
If you are fitting a new bracket to the A frame of your van use a clamp on bracket as drilling holes in the a-frame could invalidate an warrenty you have, I think these are supplied as standard.However if you use the van often you'd be better off with an an Alko Aks stabiliser, they are a lot more expensive, but worth every penny.Ther are no little bars to loose and the stabiliser lives on the van so ther are no storage issues, also it works far better than a regular bar style stabiliser.
Cheers Mark