I love solvespace. I basically only use solvespace now.
It’s very lightweight and minimalistic, but it’s not the easiest to use and very bare bones. I often have to find new ways of building things to account for the lack of functions, such as filleting an edge. In a way it’s a good thing because it’s hard to over complicate a design with unnecessary features, which I tend to do, but my designs in solvespace aren’t as nice or pretty and everything takes longer than inventor or fusion, but it takes half a second to boot up, I love the UI, and I really don’t need a complicated CAD tool for the vast majority of my projects.
The other caveat is that like any FOSS CAD tool it’s not totally stable and certain actions may get you into a bad state and possibly crash the program, but eventually you get used to it and can work around them (so far as I’ve seen).
If you’re just doing simple hobby projects, I’d say it’s worth trying out but it does take a little time to get used to. For professional endeavors it’s probably not gonna do the job.
https://solvespace.com/index.pl
I'm considering digging in.