Absolutely fantastic! Samurai Champloo is hands down one the best anime series I have ever had the pleasure of viewing. It is visually spectacular, mentally engaging and all round really really really good. Samurai Champloo is directed by the same man as the anime series Cowboy Bebop, Shinichiro Watanabe.
Evidently 'champloo' is Japanese for 'hip-hop', the music style, and 'bebop' is Japanese for 'jazz' making both anime related. The action and fighting scenes in Samurai Champloo are the best I have come across, amazingly stylistic and intergrated seemlessly with great hip-hop music and culture which is contrasted with the setting of the story in the edo period of ancient Japan making a really cool and fun, while still keeping its serious element, anime series.
If you are looking for a good anime series to really enjoy I recomend Samurai Champloo as top ten of anime you must see before you die. Cowboy Bebop is also excelent and well worth watching, the movie of which is THE best anime movie I have ever seen.
Samurai Champloo 9.5/10!