I received the gaurantee for months and this weekend they abruptly stopped all together. Disappointed is an understatement. It was the first Friday I hadn't driven in a long time. i "don't leave home without it"
If you've been chasing guarantees you've been doing it all wrong, anyway.
Never saw a guarantee I couldn't beat, until the rates dropped again last January. Then it was time to ditch both of these parasites.