I've watched the 1968 movie of Romeo & Juliet, so I had some idea how the play is suppose to go. From what I've seen of the original story (from the movie), it' as touching, romantic, and terribly sad story. I always thought the death of the two lovers was senseless and stupid (I have never quite forgiven Romeo for being so rash) but loved everything else.
The anime takes some very liberal artistic license. I think there might also be a bit mixing of Shakespeare stories as well. (Though I haven't read or watched many so I could very well be wrong.) Many of these changes are interesting, complimentary, and just plain fun to watch. Some of my favorites are putting the story in a fantasy setting, raising the stakes from simply feuding families to revenge, and making Romeo seem less like a pansy and Juliet less like a "princess in distress".
The art was simply lovely. There were only a few episodes that felt "cheap". Great fight scenes and really heart throbbing moments. I liked the music too. (Though not the closing songs.) Surprisingly, the Dubbing was good too-- I really like how they "Shakespeare'd" the dialog.
There were some changes I did not particularly like. Most disappointing was how they treated the Friar character, who is portrayed as a Priest in the anime. He was a friend to Romeo in the play, not so much in this series.
The love rivals were just... annoying. It's like the Japanese producers could not comprehend a love story about teenagers that did not involve love rivals (typically found in Japanese shoujo stories) so they forced those elements in there. Those not familiar with the shoujo genre might not appreciate my complaint: these "love rival" elements were often awkward and forced. Some were so last minute that it would have been better if it weren't in there at all.
But even so, it was a great series. Well worth your time, though expect to get a little teary eyed at the end. I'm not giving anything away by saying this about the ending: it was not surprisingly, but it was not nearly as depressing as the original play. (And at least I don't feel like strangle Romeo for stupidity!)