It's lighthearted, funny and rewatchable, and has great cast.(I've watched it 3 times)
The opening (ikenai taiyou - orange range) and ending (peach - otsuka ai) songs are really catchy as well, and if you hear those songs for the first time while watching this show, then here either song afterwards...you'll think back and feel like watching an episode.

Overall it's a great watch, it was my first and still favourite drama and really raised the bars for others IMAO. ENJOY. :)

Even though you can usually guess the culprit right from the beginning, it really makes you think: HOW ON EARTH DID THEY DO THAT?! The answer is always so complex and interesting.
The music is upbeat and fun to listen to (theme song: Face Down-Arashi)
Overall it's a great drama, althuogh I always find the rewatch value of crime-solving dramas not too good since you remember what happens.