I just installed a new Origo 3000 Alcohol Stove with 2 burners in our Morgan 33. Price wise it is economical, and easy to use. It is NOT a pressurized alcohol stove. It uses special containers that you put the alcohol into that are spill proof (you can turn them upside down and they won''t leak).
This stove can also be bought as a Model 6000, which has an oven.
Our boat had a pressurized alcohol stove that was old, and I didn''t like it or trust it. We had an Origo on another boat that we like alot.
This stove puts out alot of heat, cooks quickly, and meets all of our needs. We liveaboard. As with any device that burns with a flame...you need to be cautious and as far as ventilation, we just open the companionway hatch an inch or so when the air is on, otherwise its open anyway.
The make a combination unit with electric burners also for when on shore power.
West marine is a good source for these items.