These trees have their pros and cons. I have a few twenty five-year old trees in SoCal.
Pros - immediately beautiful, and fast. Grow tall quickly, and require little or no pruning to make canopy. The flowers are a plus when they decide to make an appearance. Provide perfect shade during hot summer spells - allow enough light for understory plants.
Cons - too fast if in the wrong spot. Brittle, break sometimes from their own weight. And the long midrib in the leaves are really messy in the Fall when the tree is large, but worth the time needed to manually clean them up once a year. Lose leaves early in winter, so not much winter protection underneath - but some.
All in all, there isn't a tree that doesn't have some downsides. These are keepers in the right spot.