My MX518 had a couple of feet fall off so contacted Logitech hoping to get replacement feet. They don't supply replacement feet so they sent me a brand new MX518 without having to send my old one back and my warranty was 2 months over the 3 year limit. Outstanding service and why I will continue to be a loyal Logitech customer. New MX518 has better base with no small feet like the old design too.