There is no one definitive answer to this question, as the number of nodes on a back massager can matter in a few different ways. For example, if you have a lot of knots or other tension in your back, you may prefer a massager with more nodes to help break up the tension. Alternatively, if you are looking for a more general massage, a back massager with fewer nodes may be better. Ultimately, it's up to you to decide what feels best!