Annoying new feature 'suggestions' cannot be switched off. Have switched to using Bing until this is disabled. *edit* To disable the irritating 'suggestions' feature just bookmark or set http://www.google.com/webhp?complete=0 as your homepage.
This site is a great search engine and uses filters to sort the content that you search like "Winny the pooh" this could return adult content so it filters the search to your taste which can be found in the prefrences
Google fails to provide users with a care free experience. There are tenths of thousands of DANGEROUS links across google that can spread viruses, yet they still appear on Google search.
Google should definitely visit WOT to have a look at all the malicious sites and remove them from their search results.
Other than that Google is by far the best search Engine.