I have had two sofas and two loveseats since 2010 and all pieces have held up well. H&M as all other manufacturers cannot warranty against wear of skins/leather or fabric.
Knowing my situation I made certain to select a H&M protected leather, Aspen Saddle, and I followed the Maintenance protocol of wiping it down with a well wrung out cloth in wamr water with just a drop of Dawn dish detergent. I do this perhaps 3 times a year or after a party when adults may have spilled food or drink. It is a small precaution and has kept my leather looking beautiful. I had had a Century leather chair and ottoman years ago and the retailer sold me guardsman products to use on it.
Absolutely ate the leather and ruined the chair. the Salesperson at The Keeping Room in Virginia is extremly knowledgeable and told me how to care for the H&M/