We use Checkaso for keeping a close eye on some apps that compete with our customers' ones. So, speaking more widely, we make marketing research and competitors analyses. Everything we need can be found in one place, without jumping from one source to another.
Workflow using Checkaso is simple and clear enough and you don't need to be pro in ASO to use it. I recommend it to marketers with any skill level and experience in ASO and mobile analytics.
Some UI/UX moments and a bit of complex logic on how to switch between sections. But there's nothing really critical.