It depends if your interested enough in learning some of the specific
details about the geology of the moon.

The writer, Chuck Wood is well known in the Lunar Science community and is a
regular contributor to S&T magazine.

In my opinion, it is not really intended to take it out to the scope, like
the Rukl Atlas.

I usually plan an observing session by reading about the area in Modern
Moon, use the Rukl during observing and then follow up my observing session
by going back to Modern Moon to review what I had planned on looking at, in
addition to reading up on any new features that I observed.

I use mine all the time, but then I'm more of a Solar System observer,
rarely looking at faint fuzzies.

Hope this helps,

Francis Marion