This anime is absolutely one of my all time favorites, i loved every second of it when i watched the fan subs years ago. Unfortunately the company that released the DVDs in the US seems to have given it as a whole no thought whatsoever.
First of all there is NO option for English, only Japanese, and 2.0 at that. Don't get me wrong, i almost always prefer Japanese with subtitles. There have been 2 maybe 3 anime ever that i preferred the English language version, Clannad could go either way, the VAs for both languages knocked it out of the park for the first season. What upsets me about this, is the fact that the subtitles are just absolutely TERRIBLE. This day and age subtitles shouldnt take up 1/3 of the screen, in a bright yellow font, with thick black borders, and be so low resolution as to look like they were done on an NES.
Then there is the fact that there are no REAL special features on either disc, just clean opening/closings. No artwork, interviews, heck not even any previews. The whole package seems kinda shoddily thrown together, which is absolutely disgraceful for such a masterpiece of story telling and animation.
If you see this for 20 bucks at Best Buy or something, go for it, it's worth that much, but the 40 dollar price tag is absolutely ridiculous for this half-assed release. I'd recommend supporting the fan-subbers on this one. The love and care i saw put into the fan sub release when i first saw it was what prompted me to support these DVDs. Had i known the actual quality of the product before i spent money on it i never would have. I genuinely feel ripped off.
EDIT: DVDs have dropped in price. Stated issues still stand, but now it's worth the $20 if you decided against the BD release. You're still better off buying the complete season which IS dubbed and averages out to the same price as buying both DVD 1 and 2 volumes.