all our company cars have them, none of them are safe to use in the rain. they're utter crap.
in my experience they dont work as well as traditional blades even when new, they dont last as long, or even look as good, so wtf is the point of them?
tesco have them cheap at the mo (BOGOF) but i wouldnt fit them even if they were free. i'd rather see in the rain tbh.