I bought this without having watched a minute of the original show, and simply due to my kids being big Archie fans. We were not disappointed, and this series is as close as you can get to recreating the comic books and digests in animated form. Plus, there are truly kitsch segments like the "Dance of the Week" and the Archie's singing their latest tune, both of which are classic late-60's gems.
There are a few niggles that took a star off, such as Veronica's "Southern Belle" voice, and the near-absence of some popular characters (Moose appears only a few times), including the total absence of others like Midge, but overall, I highly recommend this for fans of the comics. My kids absolutely love it, and have played the DVDs so many times the case has started to fall apart.
Just skip the horrible Archie's Funhouse Season 2 fiasco (which is where "Sugar Sugar" and other hits aired BTW), and move right onto the Sabrina spinoff.