I am a commercial real estate broker, so when I buy software and use it, it has to reflect a level of professionalism. This barely gets the job done.

1) The Agreements in the template look like they were written by someone in High School, and most likely not someone in the United States. Certainly not a US attorney. In my opinion, none of the Templates are usable.
2) There is zero tutorial on how to use this software as you go through it. Who cares right? We have Youtube for that! Yeah - zero tutorial videos on Youtube. One AppSumo reviewer maybe has a little help but that's it... and it's not super simple to understand the system.
3) Ever use software where the typing/editing is clunky? That's Notch. If you've created a new bullet point with words and you want to delete it, a lot of times it won't delete the bullet point and you find yourself backspacing the words in the item before it. It's clunky.
4) Notch's main component is document signing, right? Well be prepared for a very rigid document process that literally allows you to change nothing about the signature block. And when you see Notch's signature block, you may feel like a European third grader created it. It only offers First Name, Last Name, Email Address, and there's no way to change it. When dealing with other businesses, I often need Company name and Title, and custom fields to show up... this is a very bad limitation in my opinion, especially for a signature signing app - customers want to feel confident in what they are signing, and this is terrible. Sorry, but true.
5) Customer Service is non-evident. There's no phone (I didn't expect it), there's no chat (did expect), the help database really has nothing except a few users questions, and the customer service email is hidden (greyed out on a grey page) at the bottom of the contact us form. I used the contact form and AppSumo questions page - but I guess my question wasn't important and they stopped answering questions on App Sumo after the sale ended. Moreover, whatever automated system they use doesn't check if you have a question waiting before asking for a 5-taco review.

I have a lot more to say but I think you get the point.

I am not trying to hurt Notch sales, but I really get the feeling that they priced this as a great invention and maybe not well thought out software - and I don't like that. Bottom line is it's not worth $400 at the highest tier, which I got... Compared to other platforms, $400 doesn't seem like a good deal when I have to wait possibly a year for them to get their act together.

I am going to keep working with it for another week but most likely end up asking for a refund.