The best Spanish course you can purchase is one which allows you to become accustomed to the modern Spanish that is spoken by the natural born speakers. This means that because they speak incredibly quickly and fluently, you need to be able understand and be able to communicate with the language that so many people know very well. Because course such as Rosetta Stone and Rocket Spanish are interactive and fully functional, they both enable your brain to subliminally learn the language quickly and efficiently, giving you the ability to understand and speak Spanish quickly.