Been for the last two years, first time to see what the fuss was about, second because we were down at the marina anyway and it was only a ten min drive away (hahahaha, stuck in traffic, more like 40mins).
It's very much aimed, i would say, at prospective boaters/YouTubers/day out for the curious. Like a modern agricultural show just with less animals.
After an hour we were struggling to find anything to look at.
How anyone stays for the full duration i'll never know, unless of course they are there self-promoting