I am not quite an Appsumo "addict" but I have made a number of purchases, and I have considerable experience with the products (and the companies that publish them!).

I have been very pleasantly surprised with the quality of Nytro SEO product. I took some time to watch some of their Youtube videos, and was able to correct install/configure the javascript snippet with a minimum of effort. Nytro SEO has done a great deal of discovery work autonomously, and yet I have still ultimate control over which terms and keywords I choose to retain and emphasize.
Bottom here: the product does what they claim it will do!

I have separately been MORE than pleasantly surprised with the quality of the onboarding and support. The company offers no-charge onboarding help... and I admit that I was skeptical, or at least not expecting much!

In fact my onboarding call was attended by a very competent technician (Dima) as well as by the company's CEO (Lee). During our call, I witnessed how quickly and easily the product identified opportunities, and acted on them. I am very grateful for the jumpstart that both Dima and Lee provided.

Without reservation, for me, Nytro SEO is a candidate for Best Appsumo Purchase Ever (out of 40+ products purchased in the past).

Thank you Nytro!

Joe