Koblenz P-820 Shampooer / Polisher with Tank

alaTest has collected and analyzed 38 user reviews of Koblenz P-820 Shampooer / Polisher with Tank from Amazon.com. The average user rating for this product is 3.9/5, compared to an average user rating of 4.0/5 for other products in the same category on Amazon.com. Reviewers really like the size and design. The price and usability are also mentioned favorably, but some have doubts about the reliability.