Scott S.
Yelp
A great place for all things Hergé, but if you're not a diehard fan, I wouldn't make the trek all the way out to Louvain-la-Neuve unless you actually live or study here.
The entrance fee is reasonable, and the gift shop has pretty much everything and anything you can ever want with all your favorite characters from the Tintin series, but other than that there's quite a bit left to be desired.
No photos are allowed in the museum save for at the ground level which is a damn shame, and the cafeteria serves typical not quite worth the money museum fare which you probably shouldn't be eating given the amazing food choices you'll find in Belgium.
As a Tintin fan, I enjoyed the museum immensely, but if my trip was any shorter than a week, I could probably think of betters things to do in the four hours it took me to get here, visit the museum, and head back to Brussels.