It feels weird to say but I hate them. I don't know if I Would describe them as painful, but they're definitely uncomfortable. It does not feel right in my chest or my throat. And I hate how irregular the rate at which I inhale/exhale air is when I try to do it slowly. And I can't breathe in/out for as long as I've been instructed to. Ok when I write all that out it kind of sounds like I have a medical problem. But to my knowledge my breathing is fine I passed the test with that thing doctors wear around their neck the stegosaur or whatevr
As someone who's had problems with their lungs before, I always find the "focus on your breath" exercises to be at least a little anxiety inducing. But even if it works as intended, I get this feeling that I'm just pushing down or hacking my body into not feeling what I'm actually feeling, like I'm gaslighting myself in some way without resolving any core issue.