We just had to start doing the aerokat with one of ours. I was dreading it, but it has actually gone pretty well.
I’m sure this was just for the picture, but you do need to keep the inhaler in the back of it until they’ve done the 10 breaths, I think.
We are also giving the same cat a steroid. There’s a pharmacy that compounds it into a dermal gel that we just rub on his inner ear. Getting pills into that cat was hard, but he doesn’t mind the dermal at all. (And we’re expert cat pill givers - a previous feline resident of our house needed many.)