The decals are often the first thing to perish, so many builders today source aftermarket replacements or use the set as a painting practice kit.
If you want a screen-free activity that sharpens the mind and hands, the is a superb investment. It sits in a sweet spot: It is too complex for a five-year-old, making it a genuine "big kid" gift, but it isn't so frustrating that a novice adult will give up.