Have never conditioned or cleaned my Stickley leather loveseat and it looks brand new after over 20 years of constant use. Ditto for the couch/loveseat combo in the family room which has been used as a jungle gym by two generations of toddlers!
Color is important… bottle green and dark gray, respectively. Friends with pale colors seem to have bad luck with stains, discoloration, etc. Both rooms were done with floor samples so the leather was much more than we could afford if we’d done the special order/comes in 10 weeks option.
But I don’t find leather to be at all hard to care for and it wears like iron.
Two caveats…pet free and smoke free household!