Anti-glare filters are useful if you cannot move your monitor into a different position to prevent reflections from light sources. But, they put a film or cover over the screen that does affect image quality - not enough for some people, way too much for others.
Anti-radiation filters are no more than gimmicks. Period. There is absolutely NO evidence anywhere, not from OSHA, the FDA, CDC, New England Journal of Medicine, The Lancet, or ANY health and safety related organization that reports CRTs emit harmful radiation, or that you will start glowing or become riddled with cancer if you sit in front of a CRT monitor all day. If that were true, there are several generations (billions!) of people who grew up in homes with CRT TVs...