The record with voice recognition grading really helps to get your pronunciation right, and the playback of your voice really helps you find out why you did get the grade you expected. These tools give a strong incentive to practice speaking, and have helped me to progress faster. The downside is that these tools are only practically useful on PC and not useful on Android because of speed and different limited web page. (I cannot speak for Apple versions).
I would give the course 5 stars if all features were available on all platforms.
On android viewing the website, speech recognition is so much slower to respond, and much less accurate, so the time delays become frustrating - it is very dependent on internet and wireless speed. The key thing android misses is it that it has no ability to play back what you said (so that you can hear and correct your own mistakes). From the forum comments this appears to have been missing for 2 years or more, and I think Rocket Languages should make playback of your own voice a priority fix for android users.