Been with them for just under a month. Only problem I've had is occasionally the connection seems to go to sleep when I've not used it for a couple of hours or so, and no amount of trying gets it started again.
Don't know if its me or them, because a computer restart has always brought it back to life.
Usually get 2.5 - 2.9mbps which is fine with me, having crawled along on unreliable dialup for many years.