It's not bad to use, it's quite practical. When I bought it in the bookstore, I compared several versions of the teaching AIDS, and they all looked similar, mainly because I could see the high-quality places by comparing the details. For example, the setting of various knowledge points, font color distinction, extracurricular knowledge supplement and other places in the design of primary school textbooks are quite good. Many people around us are using this set now. I suggest you try.