One other thing I ought to tell you - when my kids did listening therapy in combination with OT at the Star Center, the program was different from the home version that we bought. The difference had to do with how a group of frequencies went up and down - over the course of the individual session vs over the course of the entire program. The frequencies go up and down over the course of the individual home cds and the overall home program as well, but not in quite the same way (I wish I could remember more specifically). With OT, they were able to customize the program much more - I can't recall how the OT knew, but there were certain frequencies that my dd needed more sessions with, for example.
And while I can't recall the name of the headphones that came with the home program, they were not the bone-conduction ones that they used during OT (all OT was at a facility). I thought the bone conduction thing was kinda cool.
Good luck, I hope it helps your kids
