No, I haven't. If I see some in the store I'll pick it up.
You aren't really supposed to oil locks, so Lock Ease may be a suspension of graphite in a solvent that evaporates, I'll have to check it out.. Oil in locks collects dirt and stains your clothes when you put your keys back in your pocket. Not that graphite is pretty, but I think it works its way around the pins and stays off the key after a few turns of the lock.
I usually make a pretty thick mixture, any oil (petroleum, not vegetable) seems to work ok.