'This is the key to unlocking barista-quality coffee': I'm a coffee expert and you should never use pressurized baskets

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I'm an ex-barista, and now I'm Tom's Guide's resident coffee expert. I've reviewed tons of coffee machines — everything from the $3,000 Breville Oracle Dual Boiler to the $129 Casabrews 3700 Essential — and I know my way around the mighty bean.

One thing I will not stop talking about is portafilter baskets — namely, the vast difference between single-walled and dual-walled portafilter baskets. These two things are also called non-pressurized and pressurized, which you might've seen in your espresso machine's manual.