Prespray gold is aimed at wool carpets. Power Burst is fantastic for polypropylene and various mixes. It is a great one size fits all cleaner and pwerful at PH11. No matter what anyone says I have found that using fibre and fabric rinse when extracting does make a visible difference especially on lighter carpets. I have found most of the prochem solutions to be very effective. Trafic Lane in a strong mix is excellent for "traffic lanes" and Ultrapac renovate is unbeatable for most anything carpets walls, floors, you name it. 90% of the time I use Stain Pro, Citrus Gel and Power Burst and rinse with Fibre and Fabric Rinse with Odour fresh added. Not had an unhappy customer yet. Perhaps I should mention I use a truck mount.