I've had a very different experience than feather. My family refuses to let Dexter out of my tiny bedroom unless he has a flight suit on. Dexter lets me put it on him, it's honestly easier for both of us to put on and off than the harness. It's important to make sure the suit is the correct size. The Velcro is strong (getting it undone is the most difficult part of getting it off) and takes 10+ minutes for him to get the Velcro undone.
Tbf, the harness is better. It's more secure (no way he can get that off), and more comfortable while it's on. The lead is stretchy, and he pays much more attention to the diaper.