By their very nature, dishwasher reviews are usually opinion based. Many reviews for appliances such as dishwashers do also include facts. CNET, a technical review site, includes facts such as pricing, sizes and specifications in all of its reviews.
Dishwasher reviews can be provided by consumer research sites such as CNET or professional publications such as Better Homes and Gardens. BHG.com publishes lists of its favorite appliances, including dishwashers, on a regular basis. Most professional reviews are peppered with both fact and opinion. Consumer reviews found on retail sites such as Amazon.com or Walmart.com are more likely to include opinions with few facts.