Clannad: After Story is undoubtedly one of, if not the most poignant, moving and heartbreaking anime that exists out there. Never has a story affected me so much as this. The life that Tomoya leads with Nagisa is truly one of the best stories ever written.
The soundtrack fits perfectly with every scene, emphasising the emotional or comical values that the scene is meant to convey. And the dub, which is rare to be very good in an anime, is very good, albeit not perfect, but the characters that feature most, Tomoya, Nagisa, Akio and others have excellent voices that fit the characters very well.
In conclusion, I will say this how it is, Clannad: After Story, is an anime masterpiece that will be treasured for many years to come. I cannot recommend this and its predecessor, 'Clannad' enough. 5/5