It's a spotters tool, nothing more. I'm an ATCO, my company uses it to fill a screen in our cantine to try and show off to visitors maybe? Anyway on my breaks I walk out and the picture is completely different to what was on my radar screen.
Is seems to only notice a fraction of biz jets, and the data relating to speed is only barely trustworthy if the aircraft you are looking at has been in level flight for several minutes over an area where several of the nerds who own the receivers live. Otherwise it gives you nonsense.
Before people argue with me I'll say it again, I regularly walk from a radar screen out to a FR24 tv in our cantine within about 2 minutes, and it's totally different, totally untrustworthy.