Memory foam or a hard plastic/wood foot rest — which is better?

It depends on use. Memory-foam models like the ComfiLife and Everlasting Comfort draw strong verified-purchase ratings for static comfort and pressure relief. Hard plastic and wood models (EUREKA, StrongTek) tend to be favored by reviewers who want tilt adjustment, a massage surface, or active rocking motion. Foam compresses over time; rigid models hold their height and support more weight.