Well, they cut back on the blatant racism from "Get Out," so that's a plus. It didn't make the film a uncomfortable to watch in an original "A Birth of a Nation" kind of way. But's it's still there, just slightly muted.
And, like "Get Out," it'll have the same cringe effect once its not socially acceptable any longer. But again, it was toned down so it isn't as uncomfortable a watch.
However, the film kind of gives everything away in the very beginning. Straight down to the grand event at the end. So if you're paying attention to glaring, obvious, detail the twist at the other end can be seen easier than a 20mph fastball.
There is a moment of doubt that, maybe the obvious hints were wrong, but right before the action starts the mother gives a speech to absolutely ensure that you, yes, you were right from the start.
And the racism, though toned down, makes it pretty clear that the peaceful and loving event highlighted at the start of the film, isn't just going to be for nostalgic reasons. It's going to be a plot element, only because someone like Jordan Peele isn't that type that would look at that gesture of 80s kindness favorably.