I ordered custom napkins and some bubbles a long time in advance so I can see how it looks and possibly order some more.
However, it has been 3 weeks now and my order is still processing. When I wrote to customer service they said that because they had a large sale they are delayed, which is just a bunch of nonsense because they went out yesterday with what they call their "biggest sale of the year" and I couldn't imagine somebody who is still delayed with their orders from the last "huge" sale they had to get themselves into another one. They are just slow and irresponsible. I order things weeks after I ordered that and they are already here a long time ago.
There are plenty of wedding websites and shops online, there is no need to use one that's not reliable enough with something as important as your wedding shopping!