The material is sturdy and does not move around. The width and depth fits our our deep seating sofa to a T. I noticed a difference immediately when I sat down. It’s been over a week and it’s all good. I highly recommend and will buy again for the love seat.My sofa doesnt sag in the middle noe!10 seconds to install and makes a big difference. Well worth the purchase.As well as can be expected.I have a normal couch 3 seats it was small and it does help but doesn't make it seem like new as a quick temporary solution I recommendWorked 100% instantly, easy to install. Fixed the sag on my old ikea couch in literally a second. Now, I don’t fall into the couch & hurt my butt, so I don’t have to set it on fire & get a new one!I have a couch that is only 3 years old. It sees a moderate amount of use, and is very well taken care of. My only complaint is that when you sit, you sink deep! It makes it difficult to get back up and out. So, I decided to give this product a try. This is a good quality board that does exactly what it is supposed to do!! Problem solved and my couch cushions are firm, and it is so much easier to stand back up!Just what I wanted ;no fuss ,support, easy install , just remove the pillows and put the connected support down then put the pillows back and your done !Our sofa was starting to get old and worn after sixteen years, especially now that my husband is an invalid and sits in the same spot on it all day, every day. After adding this support it feels a lot firmer to sit on and sturdier and more comfortable as well.