I personally don’t believe in them and avoid when possible.
by moving the wheel out in this manner adds additional strain on the driveline reducing lifespan of parts such as ball joints and knuckles.
It also allows more bolts to work loose (spacer lugs plus wheel Lugs) as the caliper disks expand and contract.
if you install them, you should retorque as spec’d on the spacers. Usually 200-500 miles.
the proper way is to get a rim with the correct offset.
by all means I’m not saying don’t do it, as many do with no immediate effects. I just know a lot of used trucks with them usually also have sloppy suspensions.
if looks is what you want, by all means have at ‘er.
If performance is what you want, find a set of rims with your desired offset.