I didn't know the brand of my 4 steps was Quadra Step til I opened the link and saw the picture. They are very good steps, sturdy and evenly spaced. I'm 235 lbs and of course they flex a little but they aren't bouncy. I've also carried heavy loads and they don't flex much more than when it's just me on them. Ease of install has too many variables. I've replaced steps that were welded on and different widths and it was a 1/2 day job to get everything adjusted and uniform spacing to the rv floor. You won't know til you compared all the dimensions of the new steps to your old ones and check to see of yours are welded anywhere. Just make sure the new steps aren't too wide for your structural members and then the worst thing will probably be drilling some new holes and shimming. Craig