This module is a great accompaniment to any of the specialist modules. (We all need grammar!)
It covers all the major areas, and they are all linked to each other in a wiki-link style, so you decide what you want to learn, and when.
Because of this, it is good for any level of English.
It includes current multimedia sources, like videos (real interviews with business people / news media), and looks at the grammar you find on real business websites - this is not like the grammar textbooks you know...
Give it a try!
Only 34€ / month, or 20€ / month if you are taking one of the specialist modules.