I'm not a super user, and there might be a way of doing it that I haven't explored, but I was looking for some specific icons that are just standard icons, and I found the icon library to be very focused on architecture icons. It didn't have as many standard or generic icons. Another thing that somewhat irritated me is the fact that there is a paste function in the menu, but when you right-click and select paste, it tells you that you can't use paste. You must press Command-V or Apple-V to paste. They give you a menu option to paste, but every time you use that, they say, "We don't accept it." On top of that, normally, you'd have an option for paste or paste values, but when you use the paste function, you don't have that capability. So, to copy text from one place, I have to use Command-V to paste it, but if I don't like the format, I've got to go back and do copy style and then paste style on top of that. It is a small detail, but when you're doing diagrams, it is annoying that they don't support paste values. It is a small irk. I'm not penalizing it, and I still think it is a five-star product. In terms of other bigger things, I don't really have any comments or criticism so far.
