Glass doors offer considerable advantages including maximized natural light transmission, visual expansion of spaces, seamless indoor-outdoor connections, and contemporary aesthetic appeal. Their transparency creates visual continuity between rooms while maintaining functional separation. However, significant drawbacks include reduced privacy, potential safety hazards if not using tempered or laminated safety glass, higher maintenance requirements due to visible fingerprints and smudges, typically higher cost compared to solid doors, and inferior insulation properties unless using specialized low-E or insulated glass units. Energy efficiency concerns can be mitigated with double-glazing and thermal break frames, while privacy issues can be addressed using frosted, textured, or switchable smart glass options. When selecting glass doors, consider specific usage requirements, environmental conditions, maintenance capacity, and budget constraints to determine if the aesthetic benefits outweigh practical limitations.