I have been looking for a 175 for a little while. I got a kick ass deal on one last week. I have never scrubbed carpet with one before till today, wow what a differnce. I scrubbed in some extreme clean with a red pad to about 1000 ft. of commercial olefin maybe 10yrs old. I noticed a huge difference before I even rinsed it. It came out awesome! I can't wait to try it on some of my nasties. Now I just need to find some more room in the van, wait there is no more room. Had to put it between the seats. I need a box truck soon.