I don't mind doing the Challenge locations. I even like them at times. What I don't like about them is the amount of energy it takes to get thru one. When every other blockage is 120, 240, or 300 energy units, it takes DAYS to get thru one without using up all the consumables in the backpack. Also, to get the achievement is ridiculous to have to do the Challenge. I was able to do Lady Lala WITHOUT doing the Challenge. EVERY event should be the same way.
BTW, even with the 3 extra meeples, I am short only 3 meeples to get the achievement. It should be easy enough to put those meeples in the board of regular play. I'm getting to the point of not doing any of the special events because of this issue.