The expandable organizer is great to fit in drawers of an odd length. The small trays are good for organizing smaller items (clips erasers etc). However storing writing utensils is a little awkward because the length of the longer tray is definitely too long for regular pens/pencils which causes them to slide sometimes but not enough for them to fall out. Also because of the expandable part there is a cut-out on the long tray and is really unnecessary because no writing utensil is that long. You can't store other items in the expanded trays because they will fall into the long tray. Still serves its purpose though.
This works really well. The adjustments stay where you put them. I can find my pens and pencils along with all the small stuff I was constantly losing "somewhere" on my desk.
The idea is a good one. Extending the tray was quite inconvenient as the two latches had to be releases at the same time. In the end this was not as good as I expected and I may have to fbricated my own wiith wood.