I have purchased from Box many times. They also operate as Laptops Direct and other Direct websites so most of my purchases have been computers. They do not ship to the UK from mainland Europe, their UK products are shipped within the UK.
As attached I purchased a NAS from them on Friday 3 December 2021 in the afternoon and it was successfully delivered on Saturday 4 December 2021 morning. I very much doubt it came from the Netherlands overnight.
Dodgy Dodge by his own admission does not purchase or personally test any of the televisions for which he gives advice. His advice is hugely useful and very well informed but he is an internet monkey who soaks up the information from other sources and then spends an incredible amount of time and effort regurgitating that information for the benefit of all of us. His opinions are sound, and we all find them very useful and I think we are all very grateful. But also at times he is not so accurate. Everyone takes his word as gospel, I would advise a certain amount of caution. I would not buy a television on his recommendation alone. His Box description is an exemplar.
I have found the owners and other threads infinitely much more useful, although obviously much harder work.
Obviously Dodge's experiences with his earphones was different. I have purchased thousand pounds of equipment via Box (I think more than 15k) and not experienced any difficulties.
If Dodge had done even a basic search on avforums he would have discovered that many people have purchased from Box and had good and reliable service. eg (but there are others):
Box.co.uk- safe to buy from here?
I have no connection with Box, I am a simple intensive care doctor. My comments are more directed at Dodge's advice rather than whether Box is reputable.