coffee

Aeropress is a great step forward since it's so versatile. You can brew with light/coarse and dark/fine grounds, and anything in between. You won't be able to recreate an actual espresso since you simply can't develop the required pressure over a large outlet (surface-wise), but with all the other variables (beans, roast, grind size, coffee to water ratio, water temp, steeping time) you can really maximize the use for a comparably low investment. Definitely my favorite brewer based on the many applications and recipes out there.