I tried several times. The signup up with the AppSumo code and onboarding is a mess. I noticed there are a lot of good reviews. But the onboarding experience for me hasn't been smooth. Anyway, I've sent an online support request via their chatbot, stating the problem I'm facing. I was able to log in once. Got to see my dashboard. But it had the wrong email address recorded, which is weird, because a mere 2 minutes before, they had asked me to choose the email I want the account to be assigned to.
Anyway, noticing that the email is not the right one, I change it to the email that I wanted to assign this account to begin with. Now, I'm I am locked out of my account. :-)
So AppSumo wants us to ad value with my review after trying it. Here is my review after trying to get into the product. To me, at least, starting to use a product is part of... using the product.
Hope this helps the developers as well.