It's more lighthearted than the original series, and focuses mainly on the haphazard romance budding between the two main characters. Some of the greatest moments in the series come out of things that happen in every day life, following the age old tale of "Anything bad that can happen, will happen", with side-splitting results.
Obviously, I liked the series, and I could even say that you can enjoy this anime without watching the original Full Metal Panic!, because that's what I did. (heh) It does help to know the main backgrounds of the characters, though.
All in all, this was a really great show, and it has something everyone can enjoy. ^_^
