Other than the machine being capable, what's quite important is the coffee/grind quality being used. If the grinder is barely adequate and the coffee not the freshest then a pressurized basket will help hide those 'flaws' and give something drinkable for the most part. If you use a capable grinder and very fresh coffee then a standard (non-pressurized) basket will allow the maximum effect of what you have to work with, but of course will require more effort/skill on your part as it's less forgiving. Simple way to put it is the pressurized system is like training wheels on a bike.