It should be an essential tool for all website owners - everyone should care about page loading time from the CEO down to the junior web developer. Page speed is a factor that hugely affects visitor satisfaction, and Google takes it seriously by offering PageSpeed Insights. If you work in a larger organisation and focus on one particular part of website development and maintenance, such as a content writer, then this tool won't be as useful. It's intended for users with development or marketing-related responsibility
SE Ranking is on a good track when it comes to rank tracking. It displays a graph of your average position over time which is helpful and it can also help you when it comes to identifying some basic SEO issues with your website. It boasts as an all-around SEO tool, which it definitely isn't because it lacks a link database to be your go-to tool for everything SEO. Its UI is not optimized for ease of use, thus offering sub-par user experience. It has two different interfaces for different SEO tools which, I hope, they can incorporate into one.
The support is great but they don't have 24/7 support. And time zones can also be an issue sometimes. On the other hand there are plenty of guides and videos around to get yourself started. I never really needed support for "big" issues. And the help I got was good enough.
I've never used any software beyond PageSpeed Insights and Google Lighthouse (the source of the PAgeSpeed Insights software.) I've used similar programs like Hummingbird for WordPress that pulls the same data using the same engine, but its really the only game in town as far as I'm concerned.
SE Ranking was our choice based on the suite of features it offered compared to competitors as well as the # of projects you could manage. From a cost perspective, we feel it provides the most value for your money. Other SEO tools did not offer the lead generation features that SE Ranking offered as part of their monthly plan.
The website "health" report has allowed us to fix things that Google might find strange or cause us to lose rankings, which has been very helpful.
It's given us more visibility into what exactly our SEO management company is doing and how they are performing, and if things are changing or not. It's very easy to see right from the dashboard.
Being able to see how our competitors stack up against us has helped us know where to improve, what to focus on, and how to be even better.