There are numerous reports online in forums and on social media from people whose parcels were haltet by customs. Not even just when coming from outside the EU crossing the border, but also from people who ordered inside the EU cross border. For example when ordering from the Netherlands to another EU country. I'd never trust people who say "just do it you will be fine". Yeah, if you are lucky maybe a few times it goes through, but surely not always. As already said there are numerous! reports