I love using a store-bought dressing for my spinach salads because it's easy, it tastes good and it's affordable.Making your own dressing is time consuming and expensive. You have to buy all the ingredients, chop them up and mix them together. It can be fun but if you're not in the mood for cooking, there's nothing worse than having a kitchen full of dirty dishes that you forgot to clean up when you were done.Using a store-bought dressing is much easier than making your own. You just pour it on top of the salad and mix it around a little bit with your fork or spoon. You don't even have to get out any measuring cups or spoons!Store-bought dressings are also less expensive than making your own. It may seem like more money upfront but when you consider what goes into making a homemade dressing from scratch, it really isn't worth the effort when there are so many great tasting options available at the grocery store.