The biggest problem I have with my Shruti box is figuring out what to do with it. I'm not particularly good at learning things by ear, so I watch the video of Jackie Oates singing Past Caring and really really wish the camera was over her shoulder so I could see how she's changing the notes because it takes me forever to figure it out.

Probably good for me to make the effort though. I found that video quite revealing as she's doing a bit more than just turning the dominant or third on and off.