I was really impressed by how lightweight and gorgeous it is.
Maybe a controversial opinion here, but the one thing that everyone says about it is that it looks gorgeous, and I really don't see it. Never have.
Even back when I first tried it out, maybe 15 years ago, I thought it looked strangely retro. Nowadays, compared to the eye candy that is completely standard in GNOME, KDE, MacOS, Windows etc., it looks incredibly dated.
It's all hard edges, low res icons, ugly fonts, and eccentric design choices. Yeah, it can make window elements transparent, but you can't dine out on that one trick for ever.