I can't really say nice things about any of the Apple CRTs that I have. All of them have something wrong:
Macintosh 12" RGB: loose cables in the cord means that screen is green most of the time
AppleColor RGB: some component (capacitor?) has failed so the screen gets brighter and brighter the longer it's on
Apple Multiple Scan 17 (1994): something is loose on the CRT yoke (I think) meaning that the color changes slightly so often
Apple ColorSync 20" CRT: again, some component failure, so it's only usable at certain res/refresh settings, else the video compresses.
Macintosh 12" RGB: loose cables in the cord means that screen is green most of the time
AppleColor RGB: some component (capacitor?) has failed so the screen gets brighter and brighter the longer it's on
Apple Multiple Scan 17 (1994): something is loose on the CRT yoke (I think) meaning that the color changes slightly so often
Apple ColorSync 20" CRT: again, some component failure, so it's only usable at certain res/refresh settings, else the video compresses.