Although some voices against the usefulness of these accessories, I prefer to use my Raspi B + overclocked as well abundance does not harm (..toujours). ++ On 3 sinks, only 2 are used for the processor and network controller. ++ Inbox very quickly as shipped by Amazon. - No thermal paste but double sided .. In short, a very expensive purchase not helpful to reassure anxious (like me) or meet sighted people.