Decide whether you want special motion features.
Push to open - Slides open with a nudge to the drawer front, eliminating the need for handles or pulls. An especially good option for modern kitchens, where hardware might not be desired.
Self close - Slides return the drawer all the way into the cabinet when drawer is pushed in that direction.
Soft close - Slides add a dampening effect to self-close feature, returning the drawer into the cabinet softly, without slamming.