We do not use chip board for any of our cabinet construction.  We use all high quality 3/4 inch plywood and hardwood.  When the kitchen is done, no plywood is showing.  Our cabinets are of some of the highest quality, most durable cabinets that you can find anywhere and they come with a lifetime guarantee.  If anything ever breaks we will replace it at no charge.

We have never had anyone use that guarantee.