I have been looking for a good Arabic learning program for a while. I have tried a few - none really worked. Then I found Rocket - and I must say it has been an overall good experience so far (I'm only three weeks into the program). The learning tools - flashcards, "hear it, say it", etc. are absolutely great and for that only, the whole program is worth it.
There are only two (minor) downsides to it, that perhaps Rocket could improve on:
1. While there's a very good structure to the overall program, I do feel like I could use some guidance as to how to progress (i.e. audio, then grammar, then writing, etc.). There is no such thing right now - or maybe I haven't found it, and some of the audio course refers to the grammar lesson that I haven't looked at yet.
2. A list of other useful resources could be interesting too. Pointing to websites or YouTube channels or what-not could be interesting to listen to more Arabic, too.

Overall a great experience so far, that I would recommend to anyone interested in learning a language.