Almost finished my playthrough of
Crystal Fate. Up to the last story boss (and the optional bosses). It's been a decent enough game so far. Story is nothing special. It's laid out like the last act of a story, without the first two acts in the game (though you can easily use your imagination for it). Gameplay is decent. Art and music are quite nice, though it's a bit hard to tell how much is pre-packaged stuff, how much is edited and what content is actually new.
It's pretty lite in content and it's a pretty short RPG overall. The maps are nice but don't work as well with the encounter system in place imo. Difficulty has been okay, but there's been an absurd difficulty spike in this last part. Bosses are getting like five moves a turn now, and it's really annoying and difficult to keep up with. There seem to be quite a few Yanfly scripts place, and it was quite useful for me to see how they work.
I don't think I'll have impressions that much more detailed when I've actually done the game. So to finish, I wouldn't recommend it as an example of RPG Maker used to its fullest. But it is a nice indicator of its potential. I guess, if you need a free, short-ish RPG then it's a nice, short, 3-hour romp.