If you use slipcovers to change the look of your rooms and keep your sofa's safe from Grand kids, and you don't have these, you are not enjoying your slipcovers as much as you could be. They will probably work with any type of slip covers, I have Sure Fit and these hold everything in place.  For a sofa you need one on each side and don't be afraid to push them down hard, then you will need three across the back.  Love seat same thing except only two across the back. They aren't completely maintenance free I have some large family members which means after they are gone I just re-push everything in place.  Then maybe once a week I adjust them so everything looks nice and neat.