The IOS version of Goodnotes is great; however, the Windows version is glitchy and sometimes unusable. For example, I am currently trying to draw a straight line along an already existing line over an image, but it will not allow me to, as it keeps automatically "fixing" the line so that it is at a 180-degree angle instead. If this application cannot handle so much as draw a straight line in the direction that it has been drawn, it will never be worth paying for, let alone signing up for a recurring subscription. Because of this, I am grateful that I only ever tried the 1-week free trial of the Windows version. Additionally, the undo button is glitched and undoes 3 or more actions when it has only been clicked once. There also is no option to rotate objects that have been lassoed, and the lasso tool altogether is insanely glitchy as well. All I am doing is trying to cover up terms labeled on a simple diagram by coloring over them and then replacing them with numbered text boxes, something that takes me under two minutes on the IOS version; however, in the Windows version, it takes as long as 20 minutes to get all of the drawn objects and text boxes to cooperate. This app should either be thoroughly fixed or be made free.