Solu-lime looks very expensive to me. It looks like it is very finely ground limestone, that is why it reacts faster with the soil to raise the pH. Things on their label like "improves soil structure" could be said for any lime. Also, the calcium percentage in lime makes no difference, it is the carbonate that neutralizes soil acidity. I would consider some to initally raise soil pH (if you need a rapid pH increase), but mixing in regular lime with the soil will probably give better long term soil pH control at much lower cost.