These sponges hold up well to everyday kitchen cleaning. I love that they don't have dye! Other sponges with I have used with dye tend to bleed after a few uses. You will need a scrubby to accompany the sponge but overall great product.
I haven't had them smell and they seem to hold up as well as any other sponge by scotch brite. I guess it would depend on what you use it for? I use mine to clean the tub and to scrub dishes before loading them into the dishwasher.