I bought my Nexstar SE mount together with my C5 OTA, I found the 20mm widescan not very nice for beginners, eye positioning is not trivial enough for some of the kids.
We went through some basic knowledge about the sky: constellations, star colors, the concept of light year.
We observed Saturn until it disappears behind a tree, and then we visited M6 and M7.
Time is too limited, but the kids enjoy.
GOTO is accurate, tracking is superb in this kind of situation: queuing and observing.
When I arrived home, I found that the alt arm is getting loose, and to re-tighten it, I just need to remove that little plate where the power socket and the power switch lies in. Simple and effective.