1. Reduced requirement for space between bed and wardrobe.
2. No problems of sagging doors.
3. Easier for a couple to move between the bed and wardrobe.
4. The disadvantages are
5. The is a gap between sliding doors.
6. Rails need to be cleaned occasionally for dirt. Sand grains can damage the rails.
7. Only a portion of the wardrobe can be accessed at any one time.
8. More costly.
9. 60mm frame occupies space.
10. Long rails exceeding 2m can be difficult to install. Levelling is critical.
11. Single top rail sliding doors do not last.
12. Casement doors used to be popular on the past. Wardrobes using casement doors work better with bigger bedrooms. Their advantages are
13. Access to all parts of the wardrobe at any one time.
14. Less costly for basic models. However used in high end wardrobes.
15. Doors are 18 to 20 mm thick. Occupies less space.
16. Easy to fix a lock.
17. Ideal for long wardrobes.
18. The disadvantages of casement doors are 
19. Cannot be used where the space between the bed and the wardrobe is less than 80cm. Open doors block movement.
20. Doors needs to be aligned and tightened occasionally. Sagging doors can be dangerous.
21. Gap between doors for carcasses spanning two doors.
22. Mirrors attached to casement doors cause sagging very quickly due to the weight of the mirror.

Picket&Rail Carpentry&Reno has ready-made RTG® Sliding Door Wardrobes that are fitted to HDB spaces, are competitively priced and fitted with the World's Quietest hardware. We can also customize full-height wardrobes or built-in wardrobes for those with more space!