I've started this and am enjoying it so far. I like the art style much more 'in person' than on the YouTube video. It's weird, on the video everything had a sheen to it, as if each object and the background had been shrink wrapped in polythene. But in the actual game, that's not there. Which is a relief, because it was that sheen that I was put off by.
As for performance issues on the switch, I haven't noticed anything so far other than an excessively long load time when starting the game. Although I'm not very far in, so may come across other issues later.