Well I decided to learn no more or less language from zero to, but refresh my existing, good language skills. The Complete Course English (British) seemed suitable. But again I came across a problem that I did not see in advance. The final learning ends at the intermediate level and indeed at B.1 according to the European Framework of Reference for Languages. In quite a few points to reach also B.2. Now I am certainly tested fresh and sun in B.26. Mir is important because I think that some interested parties have similar prior knowledge you may not investigate the content to be determined also entirely. You can find this information on the net, but you have to look for them.
Nevertheless, the special method of learning the Rosetta Stone language courses remains significant and in my view also promising. Learning without theory, just by images and by practice, is modeled after the language learning in children. Children also learn initially (sic!) A language without dedicated indications of grammatical rules. And yet German later in school with these rules. To learn a language completely, this part of it.
My rating is therefore based on the first learning a language to a sufficient level, admittedly. To find yourself on vacation or on other occasions cope and to perform minor amusements, the knowledge acquired are perfect. You have to know where the boundaries are. I put the word "completely" to weigh, I had to pull off at least one star.