I think that it is a very helpful place to start if you are just starting to learn Korean, or if you just want to learn the basics to get you trough if you are going to visit Korea. I like how they actually test you and you can choose between Easy, Medium, and Hard in the Rocket Record. I find this very helpful since the harder it makes it for you to pronounce it well the better off you are, I myself have gone for the medium not sure if Hard is for me, I struggle a little in the medium level so I´ll probably use it on that level for a while.