I remember watching it multiple times on DVD. I saw it again when they did the wide-screen remaster, and was a little underwhelmed. It might have been because I was watching using Now TV in the UK, which is the absolute worst way to watch anything, but I thought the wide-screen version unintentionally changed the framing of some scenes. For example: if you show two characters sitting together in 4:3, it doesn't convey much; if you now show the space either side of them that there now is, it communicates that they are sitting closer together as a choice, implying an intimacy that was never there.

I watched it earlier this year and was blown away. So many great characters and storylines. The way they portrayed various systemic problems in society without losing touch with the characters was truly masterful.

Once you finish, there's some interesting analyses and discussions you can find about the show. IIRC, they enlisted a number of urban crime authors to keep the show accurate on certain details.