I've spent plenty of time on a 2690 Glacier Bay cat with twin 150 four stroke yamaha's my BIL bought new. In a rear quarter sea or full beam sea it can be seriously dangerous. Not for me. Give me a mono hull anyday. Sure the cat hulls run well in a head sea but you have to turn around sometime. However lots of people love cats.
Too quirky for me. Kind of like a full keel downeast boat in a following sea.
The only cats I like are the old 3208's in the belly of the Bertram.