I was recommended Sailor Moon by my girlfriend, who watched it as a kid. My main motivation to watch was to learn more about her through the shows she loves, and I definitely had to cling to that throughout approximately the first 20 episodes, as it was quite a dull time watching. After that, though, around the introduction of Sailor Jupiter, I found myself compulsively watching, which doesn't often happen. Perhaps Jupiter has a certain pull, or perhaps that's also when the plot picks up. In any case, I don't regret watching as far as I have, because I found myself fascinated by the lore within. Reincarnation, lost kingdoms; it feels like a modern-day fairy tale. If that's your kind of thing, then absolutely give Sailor Moon a try. It's my go-to series for that fairy tale aspect.
One big turnoff: In the Japanese dub, at least, Usagi (Sailor Moon)'s voice is /annoying/. I'm still not entirely used to it after almost 40 episodes. Other characters are better than her, but not all that great either. If voice acting matters a lot to you in your enjoyment, this most likely is not your show.
I gave the art a score of 7; while the animation is occasionally distractingly shaky while being filmed, I will chalk that up to the era and focus on the beautiful watercolor effects. Typically, characters are cel colored, but when Sailor Moon wants visual appeal in a particular scene, by God it will give you visual appeal. The aforementioned watercolor adds to the overall fairytale feeling, and if I'm correct, sometimes actual glitter is used in the animation of transformation sequences. It looks pretty dang cool.
In conclusion, if you're looking for originality or raw quality, Sailor Moon isn't what you want to watch. But the execution of the fairy-tale tone has a draw that I haven't seen matched in another series that I can think of.
