Umineko is a weird novel, it's not bad but it's not something I enjoy, is more about resolving a mystery than anything else and while they resolve this mystery they develop the characters bit by bit (tons of characters)
To put it clearly I got bored, I had to read 20 hours of something I don't care or I find extremely boring to reach what I consider the good parts that don't last longer than 1 or 2 hours at max, it is super long, it's more like a chore than something I enjoy doing, I think I'm at the end of the 3rd chapter right now.
I can't fully explain it without giving you spoilers
Don't get me wrong I'm not saying is bad, again, I find it boring mostly because A) I don't like mystery related stuff and B) specially when that mystery is related to supernatural stuff like magic or witches etc.