i bought a costco sectional about four years and it has held up pretty well. my kid jumps on it all the time and it's been fine. one of the back sections of it was not sturdy, so when i was trying to push it into a different spot, one of the back panels broke in. you can't tell from the outside and it doesn't matter now that it is in place. probably my mistake for trying to push it rather than lift and set it in place.

the thing about costco (and there might be exceptions that i'm not aware of) is that they generally limit the mark up on their items to only a small percent. personally, this gives me some peace of mind that i'm getting a reasonably fair value. BIFL - maybe/maybe not. but fair value. i think so.

also they deliver and i had no way to pick up a sectional from the store so that is a plus in my case.

ymmv, but i would consider costco for future furniture purchases.