Ribbons can sound clear and transparent if you are there in the sweet spot. However, stand up above the ribbon location and your top end disappears quite a lot. They also don't seem to have the naturalness of a silk dome tweeter and, although fast sounding by themselves, they can sound a bit disconnected from the cone mid/bass driver.
However, silk domes vs metal domes also have their own inherent problems. There is no perfect picnic.