I built a wing jig in the morning and had a wing assembled by that evening. Both wings were assembled and rigged on the fuselage in three days. It was an enjoyable project and not difficult.
To be fair, I did use a vertical mill to cut the bird mouths in the spar reinforcements. That chore on the mill was about 30 minutes including setup. Doing that with a hand saw and files would take at least a day.
Even so, I don't think a builder saves any significant time with the quick build wings when you look at a year or more for the total build.
John