I just ordered a set of Bea's Keys and I'm thrilled with them!
I've been using them with my students and doing speed races to see how quickly they can make the association between the keyboard and the note on the staff. They are loving it as well and the more we do this, the better they get! It's a quick, fun activity that can be done easily within a lesson time and it's much more exciting than flashcards. Love these!