Heads & Shoulders above Google. It offers soo much more, & it's flexibility is able to make your experience unique.
I only wish that someone would make a Tutorial on adding engines & other various customizations. I couldn't find any 'real' documentation regarding how to craft this gem to all my likes. For that reason Nibbo will get only 4 out of 5 stars. It would deserve 5 Stars, but adequate documentation is important. The 'quick start' leaves you wanting. Surely in over 6 months it could have been produced.