Rankings are based on feature availability, material specifications provided by the manufacturers, brand popularity and commercial relationships. Scores reflect research, comparison of those details and, where available, hands-on testing. Both affiliate and non-affiliate companies may be included. Criteria we consider include:

• • Effectiveness: How well the product fulfills its intended purpose.
  • Performance: Whether the product appears to perform consistently and reliably.
  • Usability: How easy the product is to use and understand.
  • Cost: Whether the price looks reasonable compared with others in its category.
  • Features: The set of features offered and any that set it apart.
  • Customer reviews: What other customers say about the product.
  • Brand reputation: The brand’s reputation for quality and customer service.
  • Design: How the product looks and is built.
  • Commercial relationships: Compensation arrangements with featured companies, which can affect placement.