I've bought a few things here and there from AppSumo. I'm very careful with my money and making decisions about where I spend it. SiteGuru is the best thing I've bought on AppSumo. I am by no means an expert in SEO, but I was pleasantly surprised that it offered the basics I needed from SemRush or Ahrefs for a fraction of the price. I currently have one website on there and monitor links, site performance, and little things I can tweak here and there. I like that in the weekly report it usually tells me what's "Low-Hanging Fruit" that can be worked on in just a little bit of time to make a difference. I had a question about an issue and they responded very quickly. In fact, they were much quicker than I expected and than I could be. I'm working on getting another site up and running and plan to purchase SiteGuru for that site as well.