What, the Dick Grove? I've borrowed it from someone a couple of times. It'll whip you into shape. I've been thinking about investing in my own copy too.
I think it's worth the investment. It's helped me a lot,anyway. All it is, is the standard scale and interval work in all keys with piano accompaniement,and there are no fingerings or bowings, so you can customize it yourself.
Thanks for the input, it looked like a good investment, just whated to throw the idea in before a purchase. Sounds like it would help me to get my scales, triads, and ear into shape. Dick Grove