Transaudio is correct; the Crown was originally designed to be able to survive a fall off of a donkey. For real.
The weakness in them is the electronics. Seems to me there was an original version that was tube, but I have never seen one... anyway, the transistor units have a lot of the failings that transistors often have IMO. I may still have some LPs that Robert Fulton (founder of the modern high end cable industry) recorded using his 'modified' Crown; those recordings are excellent, although musically they are typical audiophile, which is to say ABYSMAL :)
There has been speculation locally about whether or not Fulton really did modify his machines. After he died (rather suddenly) a friend of mine obtained one of them from his estate and it was entirely stock!
So other than my comment about transistor vs tubes... perhaps my comments about the electronics might be taken with a grain of salt (although if you find one cheap I would not turn it down, and also I would expect to replace every electrolytic capacitor in sight in the electronics). I've usually stayed away from them mostly because they seem more consumer than pro to me (same for the Revox...)