The ebook that I published after combining a few blogs was disastrous. Despite the project appearing fine on the preview, after publishing spacing and fonts changed randomly, some quotes became captions and others not, images were dropped. The advice I got from the support chat was to start over.
The support chat claims to respond in < 2 hours - I have issues not responded to after more than a week.
I was advised to book a spot on a support team member's calendar for a zoom meeting which I duly did, at 10 pm my time nonetheless, and got stood up. No response to date, not even an apology for missing it.
I would steer clear of Designrr.