I have only tried a couple and they both worked. I think the non-compatible issue may be overstated. There are others on here that I'm sure will reply on this though and there is a thread in the charging forum where people have posted what issues they have had with different chargers. If you haven't already downloaded plugshare that's an awesome app to show you which stations are in use and out of service. If you are planning a longer trip you may want to check out "A better route planner". Hope this helps.