I do almost all of my composing and arranging in Staff View and have since Cakewalk/Sonar had such a thing.
I am aware of quirks and bugs, but I have no major trouble in X1. I jumped from 2.2 to X1 (!) and I don't recall a painful transition.
I do not use the Smart tool. I use the pen most of the time, with the razor/eraser or arrow tools as needed.
Although it seems odd, I find it quicker to enter a note with a pen, and if it is not the right duration, right click and change it. Then, I use the pen to drag copy it whenever I need another note of that duration. Once you have a quarter, and eighth, and a sixteenth on the screen, it is quick to drag copy whatever you need. I know that is not ideal, but it works for me.
I did open a ticket with Cakewalk one time to tell them that the note duration selection thing didn't work right. They were very polite but said they thought it worked and asked for a video. I never followed up because it didn't bother me that much.