How well it works would depend on what your cooling problem is, it won't cure a clogged radiator or anything. All I can say is that mine would run petty hot, just below the hot mark but never overheated, before I fixed mine and now I don't think it has ever gotten past half.
I called the Suzuki dealership and they had no idea what I was talking about so I just got it from the Toyota dealership. Use the part number in the link and I think I only use one bottle. It's pretty cheap and an easy place to start when trying to cure an overheating problem.