I've used a Rock Chucker and I was impressed with the smoothness and apparent build quality. But it doesn't do anything as well as the Lee Classic Cast that I have and it costs a good bit more cash.
That's often been my experience with RCBS items, most certainly including their reloading dies. Seem to be well built and good looking, but cost a lot more and aren't as good, don't have the same features and don't work as well.
Attention Brass rats and other reloaders: I really need .327 Federal Magnum brass, no lot size too small. Tell me what caliber you need and I'll see what I have to swap. PM me and we'll discuss.