I've been using it on my ROG Ally and have been having a great time with it - it's actually made my ROG Ally my main PC lately (my Ally is a lot quieter than my desktop). I was dual booting Bazzite and Windows at one point, but (iirc) a Windows update borked my dual boot and instead of finding a workaround I just installed the OS on separate SSDs and swap when required (though I've been using solely Bazzite on this thing for weeks now).
I know an official Steam OS is just around the corner, but I might be hard pressed to move away from Bazzite because it's been a solid experience so far.