I use M-Power and find i need to get quite a bit down to get the result i want but both carpets had heavy soiling the old one had bad traffic lanes and the newer one had lots of baby vomit,cola,tea,poo,ketchup and nail varnish when first started with M-Power i wasnt getting the results because i was using too little but once i put down more i was happy with results.
Not the most scientific test for the glide but i was impressed.