Notice how all of the reviews are from a 2 week period? This app is a great idea but its buggy and incomplete. Editing a position is buggy and often doesnt work; and as far as I can tell, the only way to delete an individual position is to delete your entire portfolio. The cliff period option doesnt give you any way to set a starting or ending accelerator. The tax calculation options dont take AMT into account. Theres a need for a great app like this... This isnt it.