I think so.This is a good quest and there are a few related quests that serve as follow-up as well.
I've not yet encountered a quest that wasn't good. Some are funny, some are tragic, some genuinely made me want to kill somebody initially, then change my mind when I hear their side. I hope that the Witcher 3's popularity gives Bethesda cause to think more about their side quests in Elder Scrolls and Fallout.
What impresses me the most -now, with that particular quest in mind- is The Wither 3 engine. I mean, you can enter buildings (and caves) and they are part of the world already, yet they feel like they are their own thing.
When I was in the building (you know what I mean) I never ever felt disconnected from the outside world once I entered the place, everything was the same outside, the rain, the foggy atmosphere..., the dead soldiers with their bodies under 30 centimeters of water (that also was super realistic, the water and the grass softly moving below it, a great effect, it's exactly how things like rocks look in dampened grassy areas when it pours).
This is one of the things that make this game a masterpiece, in my opinion. The non differentiation between outside and inside areas gives this game credibility that others don't have.