Well, its a love or hate it series, it's entretaining but it has heavy flaws in some parts
The first 8 episodes were great imo but it went downhill at the end of the Dark Kingdom arc and started to climb back in the Black Moon Arc
Pros:
Excellent Music
Voice Acting is really strong sometimes
Mamoru isn't usless
A more mature serious plot
Cons:
Inconsistent writing
Bad animation
Not so faithful to the manga (Censorship), that heavily damaged the first arc
The 90s series kicks Crystal's butt in terms of charisma and character development but this one is worth a try considering that it got good again after the episode 13 and its really dark sometimes
This is the actual SM Crystal intro btw