After having studied half a dozen foreign languages from different courses, I will not recommend Routledge for a beginner in Hungarian language, and this for many a reason.
Lessons are overcharged with material, especially new words, that one should take time to digest before getting to the next unit. Shorter lessons (40 instead of the actual 15) would work better.
After Unit 7, texts and dialogues are no longer translated in full, but the reader has to rely on words provided in the vocabulary at the end of the dialogues or, worse, in the glossary at the end of the book. This makes the student waste a considerable amount of time just to understand what he or she is reading, a time that could be better used in studying the grammar. In addition to that, there are words not included neither in the former nor in the latter listing, making necessary a good dictionary at hand.
The material in the cd's is recorded at full-speed, a speed that would challenge, in my opinion, many a native speaker in catching all the words, not to mention a beginner. On top of that, in a handful of cases the written text is not consistent with the recorded one.
Hungarian grammar is characterized by extensive use of cases (at least 17, but likely more). So I was struck in waiting until Unit 4 to be introduced to the Accusative and to Unit 6 (in a course of 15) before getting to other cases. One should be introduced earlier to those features, in order to familiarize with them.
As already noted by another reviewer, there is no excuse for the many misspellings in a course intended for first-time learners.