I've seen delays at customs with one vendor in the states (and got the silly post office customs charge) but it did arrive. All other times, the goods have come through without a problem. Straight to the door within 7-10 days which is what I'd expect (from USA, although in this day and age that seems ridiculously slow).
GKE, of course, is amazing. They ship within a day and it's here within 2-3 max.
For me this is all very new and so all of this has happened in 2015.
I wonder if there's been a slackening off of interest from customs this year?
@Crunked I would be mighty peed off if my paid-for goods were seized and that would have put me off buying from USA big time. 2 kilos disappearing into the ether would make me seethe.
I don't know if things are changing but it's not been bad this year for buying root and getting it shipped to the UK and Edward's experiences echo my own.
Hope that things go forward as positively as they have and hopefully other vendors can eventually get on board the UK bus.