Deutsches Haus at New York University

Overall awesome
I took a year and a half German course at a different school, and could not neither communicate in German even on simplest topics, nor could understand normal-​speed German speech. At that school we were doing mainly grammar, but in Deutsches Haus the teacher pointed out that you can spend years learning grammar and still not being capable of actually speaking in German.
So, in Deutsches Haus they have a method to make people start speaking almost from the day one: the teacher talks always only in German (I am a beginners level), and after couple of lessons i felt that my level of understanding increased from roughly 50% to 90% of what the teacher was saying.
Additionally, the book they use encourages you to learn new topic-​related words, and make you practice them in different ways to make sure you will remember them for later.
I do feel that a month that i spent in Deustches Haus was more beneficial to my German than a year at a ‘grammar’ school
The only downside might be the price — it is around 600 for 11 week course, but i feel it is worth it. May be also the fact that lessons last 2.5 hours, which can be somewhat tiresome after a long day at work :)

The German Classes are taught by great teachers and the cultural programs are stimulating and informative.
Die Deutschklassen werden von grossartigen Lehrerinnen unterrichtet und die Kulturprogramme sind stimulierend und informativ.

I was going to give this place «funf Sterne» and write the whole review using the German I learned, but, oh wait, I still kinda suck at German. Regardless, they did a pretty good job, so vier Sterne for you.
I wanted to impress my numerous German colleagues by showing an interest in their mother tongue. I had used a German computer program (Tell Me More German) to get the ball rolling – a very helpful first step, though by no means sufficient to really begin speaking well. In the words of Frau Blucher, German grammar «can be treacherous» and I needed the help of a teacher to wade through it.
The class was low-​key. Most in the class were either opera singers or they were dating a German, so they weren’t supremely motivated. There were no real tests, and not really much homework. I did all the assignments in the book, but without a test, nothing really «gelled» for me. We spent maybe 20% of the class speaking in English, to explain grammar.
But, the teacher was great. She was helpful and nice, and anyway they can’t be too ambitious in a level 2 class. I didn’t sign up for level 3 right away, but I may take it next semester.
So, if you’re pretty ambitious, this kind of class might not be ideal for you. But there aren’t that many German classes for adults in this one-​horse town, so this may be the best option. You can always test yourself. (I made flashcards!)