I'm biased since I made LiveSvelte, but it works quite well! I made a video to showcase some of its features here: https://www.youtube.com/watch?v=JMkvbW35QvA

Working with it in a real project now, instead of toy examples like in the video, it works really well for when you have highly complex components that rely on quite a lot of local state.

What you'll find is the developer experience is quite nice with LiveSvelte compared to JS hooks.