Are Blackout Curtains Worth It for Better Sleep and Energy Savings?

Has anyone recently upgraded their home with blackout curtains? I’ve been looking into different options for improving sleep quality, blocking outside light, and adding a modern touch to interior spaces. I came across these blackout curtains from All Cotton And Linen and really liked the elegant design and room-darkening features.

I’m also comparing them with sun zero blackout curtains and wanted to know how they perform in terms of insulation, privacy, and fabric quality. Do blackout curtains really help with temperature control and energy efficiency in bedrooms or living rooms? Would love to hear your experiences and recommendations!