Cash Register Express is a very basic, simple POS system that's best suited for stores with 1-2 cash registers. The system is designed generically for retailers across industries, and doesn't offer native fields for wine retail-specific attributes such as vintage, case quantity, or even bottle size. When setting up an inventory with this POS system, a store needs to carefully consider the data points they'll need to track--especially if they want to integrate this data with a website and wish to minimize growing pains.
This POS system is the key retailer POS for pcAmerica, who also has a restaurant POS called "Restaurant Pro Express". Though pcAmerica still exists, they were acquired by Heartland Payment Systems in February 2015--alongside Liquor POS and a few other retailer POS systems. Though under the Heartland umbrella, this system has not changed much since.