Logic prevails in most situations.

Waterjet Works cuts a fair amount of wood, as long as it is solid wood we are fine.
Logically, inexpensive particle board does not do well.

Glass is another logical thought process. We have had wonderful experiences with glass and stained glass, but we can not cut tempered glass. It is designed to shatter when we blast it with 50,000 pounds of pressure.

Carpet is tricky. It can be cut beautifully with a waterjet machine, but you really need to know how to cut it and have the correct machinery. Good commercial grade carpets will work well, but an inexpensive carpet will probably not make it.