The best thing about this tool for me was its speed, it has no lag or delays at all when running tests which makes debugging very easy as well! I also like how simple everything looks in terms of configuration - nothing complicated there so you don't need much experience with coding etc., it can be used by anyone who knows HTML code (which includes non-programmers). It doesn’t have any downsides either but if someone wants something more advanced then they should look into other tools such as Selenium Webdriver instead because blackFire isn’t really meant for those looking for an end user friendly way of doing things. We use it mostly just during development stage where we run our automated functional test suites from Jenkins using various frameworks including Laravel Dusk & VueJs. As mentioned above, one great feature here would definitely be ease of debugginng due to lack.