Fantastic. Just like a brand new one, it will last until it fails. I may be old fashioned and pig headed, but I still feel that the OE style of radiator has better quality than the majority of the ones that are sold today. They seem to last longer. True, most of the issues with modern radiators seem to be a failure of the adhesive at the seam between he tanks and the core, but it's still a failure. I would also rather run a used brass/copper radiator than a plastic/aluminum one.