Yeah, a lot of us have tried them. I use the ones sold through the Autopia store but they're the same thing. Not sure if the current version are the same as what I have though, there've been a few revisions over the years.
Nothing wrong with them, that's for sure. Different from the synthetic-material MFs on the market, some will prefer one type over the other. I use both myself, can't say that one's better than the other; it's not so much a Coke/Pepsi difference as a fish/fowl one IMO, they're simply *that different*.