It depends on what you are looking for. Some people look for varieties/errors, and they usually search at a table and use a big magnifier. I'm just looking for wheats and upgrades to my memorial set (I pull coppers too, but that's not really my point in searching). I don't need magnification, so I like to do it on the floor, in front of the TV. Takes me about an hour and a half to two hours to do a box, but it used to be longer, when more of the memorial cents were upgrades.