Great suite of tools - I use their keyword tracker to check keyword difficulty. I’ve noticed it tends to be more accurate than Ahrefs. I used to pull up the actual SERPs and look at the sites ranking above my client when evaluating if we were likely to be able to rank higher than existing sites.
Now I pop all the terms into their keyword tracker and just go by that. If you’re skeptical, they also have a SERP feature within the tool that displays a ton of information on the ranking pages (search equity, referring domains, backlinks, content length, and how optimized the page is for the identified keyword).