Using a vintage object for a coffee table adds a bit of history — a story — to a room and is one of my favorite things to do. Make sure the piece is stable and all the connections are secure. If you need to refinish the piece ask the vendor precisely what it’s made from as this will help in the refinishing process.
Coffee tables should be the same height as the surrounding seating with 18 inches being a good average (although it will depend on your furniture). If you select a coffee table with a lip make sure the lip isn’t higher than the adjacent seating or you’ll end up hitting your drink against the lip when you try to set it down. The idea is to put your drink down not up.