I used SmartMusic in my classroom several years ago and then I stopped for several years. The reason I stopped was that I was creating all my own assessments and I simply didn't have the time to be doing it. Now SmartMusic has added assessments for soprano recorder. The assessments available are from a good recorder method called Recorder Express by Artie Almeida.
I like to use the program as a whole group activity. I project it onto the whiteboard and turn off the assessment feature. There is a cursor that tracks each beat so the kids stay together in the music. Since I am not needing to point to the music, I am able to watch students and help with hand position, fingerings, etc.
If you haven't seen SmartMusic in action, there are quite a few videos on You Tube. Here is a brief video of what the students see when we are using it as a whole-group activity (the sound quality isn't that great because of the combination of the laptop speakers and the video capture).
If time permits, I will also allow a couple of students try it with the assessment portion turned on. In my previous post, I discussed recording options. This is a nice way to record individuals playing recorder.
SmartMusic is fairly expensive. However, I don't need the gradebook function that our band director needs, so I just use the practice room/student edition which costs $36 per year. Students can also subscribe at home so that they can practice and make their own recordings.