Been using them for 10 years on 4 different cars, no problems ever. A metal fan will do some serious damage to your hand a flex fan won't do as much. The only problem I have with them is the engine runs 5 degrees cooler than the thermostat.
I’m glad that you’ve been lucky, it’s just that I’ve seen and know of countless cases where these devices have let fly after being repeatedly flexed. Here’s a post right here on FABO that illustrates my point. *MUST READ*--Flex Fan Danger--Be very careful working on old cars
