No, it is smooth. First download and install the plug-in, and then click on the courseware or lesson plan to be used. There is a buffer of about 5 seconds when opening. After opening, you can directly adjust and modify the second lesson preparation, which is really convenient to operate. PPT, in particular, is so exquisite that I can't do it myself. Modifying such a beautiful PPT feels like I did it myself. What a great experience! I can change it at will and save it as my resource!