These inserts have completely transformed what used to be a completely non-functional pantry. We used hot glue to fill the gap and remove the sag from the fully extended sides. Now they are rock solid. We used angle brackets to secure the shelves so they won’t tip when the inserts are fully extended and loaded. Also screwed the inserts into the shelves for stability. No issues when pulled out loaded. Finally proper storage! Only rated 4 because the vertical offset wastes space and we would rather have the additional clearance. Also, the manufacturer could easily supply nylon spacers to fix the gap when extended to avoid the sag- but a little hot glue in the gap did the trick for us.

Will be getting more!