This evening I finished Sailor Moon Stars.
It's quite a good series with a rather different storyline in that the enemy is very different to the enemies in the other series. The Sailor Starlights were an interesting addition and gave the story a different focus than the earlier series, the one issue I have with that is that sometimes it looked like Sailor Moon's team had their attack powers scaled back a bit to make it look like the Starlights were more powerful.
I also thought that while there weren't any obvious filler episodes several of the episodes were padded out with a bit of filler. However, it was good to see Sailor Saturn getting some decent screen time.
The final battle was spectacular and, given Sailor Moon's character and personality, it ended the only way it could have ended.
So, my Sailor Moon marathon is over and very enjoyable it was too. For a series that started 30 years ago it's stood the test of time very well in my opinion.