I use the RCBS version, though if I had a couple hundred more cases to do, I'd go for something electric powered. That said, the RCBS unit is rather inexpensive and well worth the money.
I have the 21st Century lathe and cutter combination. It ain't cheap, but it's still half the price of some others. I like the fact that it's self aligning. It's also VERY quick to use and seems to be accurate. The cutters come in many different flavors to suit your case profile so that you don't damage the neck-to-shoulder junction.