I find goodnotes is pretty good and convenient app as it can draw the shape quickly and its ability to annotate pdf with adding pages and so. However, there might be some bug as I cannot use my lasso select sometimes using my surface pen 2 to hold it. The textbox and keyboard features should be included as it can bring a lot of convenience to the user. I hope the export pdf function is included as well otherwise we can't export our pdf and our work.