The lights work perfectly and are much better looking than the original ones, but they are not error free.
After discussing with lots of people on here everyone seems to have the same issue with them no matter where you buy them from. Every so often an error message displays on the MFD stating there is an issue with the bulb even though it is working fine.
In order to get rid of the error you simply need to turn the lights off and on again, then the error message disappears.
I've not yet come across anyone yet that hasn't had a similar issue with LED replacement bulbs, most people seem happy to live with it.