I used a BenchSource for a couple of years. It's a fine annealer, but I got tired of having to adjust the torches for each cartridge I needed annealed. Using 1# propane bottles, I was always checking torch flame as pressure changed as bottle started getting low, so I set it up w/ 20# bottle hoses.
Got tired of all the adjustments to do go from cartridge to cartridge!
Bit the bullet and got the AMP and then the Aztec update several years later. Yeah, it was expensive, but one of the best upgrades I've ever made.
It was good for me because I reload 12 cartridges with a variety of brass, fast to change and perfectly consistent annealing.
For a shooter of just a few cartridges, there's any number of much cheaper annealing methods available.