I think this is a product with real promise, but I have knocked off two tacos from their review score for the following reasons.
1 - Their web browsing does not work properly. I compared the outputs between Native GPT4 and their GPT4 with web browsing enabled and they were not even close. Native GPT4 was so much better.
2 - No ability to contact support through their help center! I had to find an email from here in the Appsumo questions to be able to send them my findings.
Happy to revise this review as each of the above points gets addressed.