I enjoyed watching Grisaia although not due to it's harem tag which I don't actually see why it's even there as while Yuuji does live with a bunch of girls I wouldn't say they're in his harem. The story it finishes off is concluded decently with what you'd expect for an anime like this, it also provided decent action and drama throughout it which also leaves you satisfied. While not being an anime I'd go out of my way to watch or rewatch later in the future it was still decent for the experience it gave and wouldn't be against not watching it again if I hadnothing else to watch.