Running with an Unloader Brace?

Any one here run with an unloader brace? I just got mine and tried running with it a couple of times last week. I’ve got a Breg Fusion which is adjustable but it’s still really uncomfortable on the outside of my knee where it applies pressure and there’s still pain on the inside of my knee when I tried running with it. I had microfracture surgery last fall and was hoping to be able to do some limited running but I haven’t had any luck doing this so far.

For those who have one, were you able to run pain-free the first time you used it? How long did it take before you felt comfortable running with it? I would really appreciate any feedback on this as I miss running! Thanks.