I've bought twice from Gardening Express. I should have learnt the first time.
Order 1: korean fir and pomegranate. The fir arrived after 10 days in transit in very poor condition (it dies 6 month later) and the pomegranate never arrived at all, a refund was provided for the undelivered item. The 5 year guarantee is not seemingly valid as i still advent been refunded for the dead fir tree.
Order 2:2 x pomegranate and 1 bird of paradise. Again same problem with Hermes, plants were in transit for > 7 days and the trees arrived with dead branches at top and dropped leaves. Photos were sent immediately of damage requesting a replacement and return, 2 weeks later i was told it was "superfluous" and no replacement/refund/return would be made.
Please don't be tempted by the seemingly attractive prices. The plants seem ok, but using Hermes and taking 7-10 days to deliver boxed live plants is only going to end one way.