I paid for a pro membership, and yet my projects do not save! they appear in the "saved projects" area, but just as the original template and without my actual work. When trying to save a new project it only gets stuck, and when I try to "refresh" the page all my work is deleted and I must start all over. Also no one ever answers in the service chat (not even the bot), so I cannot even get supoort. VERY sorry to have paid them money!
They claim you can create mockups for free but instead force you to use "premium elements" in the mockup, which requires a monthly recurring subscription. Extremely deceptive.
By customization on dont mean pure aesthetics, I mean the ability to use the tool as a way to create app store submission packages that really work. The dashboard is still buggy, doesn't behave well in Chrome and most of the time just reloads the homepage when you try and filter by platform.
I guess if you want your mocks you have to go take professional picture. This is a well organised, functional app please. You even get more mocks here out of the box.