The classes in the fanar are very well structured, the european institutes teach arabic in the same curriculum, (had some classes in brussels,holland and uk before). Keep in mind that you do need to take some time out to review lessons in your spare time as the lessons are only 1 1/2 hr. per class. Ans it is definately worth taking the lessons, if you can read and write already you do not need start from level 1, you can probably enroll for level 2.