As said already, you will waste you're money if you buy one of them. If you read any material on modifying suspension, they all say you get more benefit from reducing unsprung weight, and increasing anti roll stiffness etc.
How can a piece of pipe bolted to the top of you're strut make any significant difference to the handling of a car. If the strut moved that much, after all the years the car has been on the road it would have suffered metal fatigue and split the strut top.
If you really want to stiffen you're chassis up, seam weld everything and weld bracing onto the suspension mounting points.
If the car is being used on the road, it would be detrimental to have too stiff a set up anyway, any chassis has to have some flex. Otherwise you move stress onto suspension components.
If you want a shiny red piece of metal to make you're engine bay look nice, carry on. Otherwise invest that money in better shocks, springs, anti roll bars and poly bushes.