Not much headroom for the second person
The quarter berth is my favorite place for sleeping. It's quieter when on the hook, allows me to pop up to check whatever and is a great reading space. However, when my wife is aboard it doesn't work well for two. The space under the cockpit has too little headroom. One stares at the ceiling a scant few inches away and neither of us want to be there. We usually make up the main salon berth.