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. People really like the size and design. The price and usability also get good reviews. Many are negative about the reliability.