OK, I just ordered these. I am working only occassionally with a teacher for reasons I've explained elsewhere, but I had my third lesson since starting in late October just yesterday, and my teacher said, "All you need is to keep playing." She gave me a few very useful tips and pointers, and I will be back at it on my own, probably for another month or so.
That these come with a recorded accompaniment will make my wife happy since I won't have to pester her to play for me.
Thank you, everyone, for your replies.
-S-