Performs flawlessly in every detail, without sacrifing weight or bulk. I will only award this rating to products that are reasonably priced.
Nearly perfect. Falls short in minor details, or requires some sacrifice in terms of weight, bulk, or price.
Worthy of consideration by a serious hiker. Works quite well overall. Not the best in its class, but don't rush to replace it if you just bought one.
Has significant flaws. Largely meets its major design goals (or my goals for its use), but has plain drawbacks.
Avoid if possible, especially for extended use or harsh conditions. Fails to provide a margin of safety in performance, or is egregiously bulky or heavy. Still better than nothing, especially for short day trips or car camping in fairly good weather.
If you encounter one of these, burn it to prevent it from being used by someone else . A serious safety risk and/or a crime against industrial design.
Do not stare directly at this item. Move as quickly as possible to an underground shelter at least five miles away, and notify the authorities