5 days after having brand new,  cream colored carpet installed my husband sliced his foot open.  He was able to get off the carpet and into the kitchen before covering the floor with blood.  There were only a few drops of blood on the carpet until my blind dog,  running in to see what was going on, stepped in the blood on the kitchen floor, tracking it all over my new carpet.  We had purchased the strainstriker portable, as well as the Carpet xpert with stainstriker. The portable got all the blood up with no problem at all.  Shark user for life!