The AMP machine looks great. I'd maybe have one if I didn't already have a Giraud, with which I've had a lot of experience for about 8 years now. I'm pretty comfortable setting up the flame, with a regulator, measuring it and its length from the case neck, and monitoring the dwell time, with and without Tempilaq.
Some ignored facts are:
There is a "window" in which annealing occurs, and it is not measured in fractions of a degree or nanoseconds. Having it "Perfect" (based on what? Some surrogate outcome hardness test the AMP guys said they did with some "scientific" tools and a microscope that you have blind faith in?) may not be as important as having it *consistent* from one batch to the next (hence the regulator for the torch).
The research the AMP guys have done with their instruments, hardness tests, microscopes, etc are welcomed to the community, but they are just that - surrogate outcomes for what we all want to know, whether a gun shoots better if you minimize variability or maximize the value of some variable such as neck tension or brass hardness. Nowhere in the AMP materials do they report the results of tests like Litz did, and show that annealing makes you more accurate, or reduces SDs and I'm not aware of any good data, rigorously collected, that demonstrate a favorable effect on SD or accuracy from annealing, or that if it exists, the AMP does it better than another method. What if I told you I have a device that measures and reduces variability in primer seating pressure? Would you buy it if you didn't know whether it had an impact on velocity SD or accuracy?
What if a manufacturer changes the brass recipe - manufacturing process, brass formula or neck wall or shoulder thickness? How is the AMP machine to be "perfect" with variables that change after the latest AZTEC program? How many cases and lots were tested to set the programming? What is the repeatability of the testing? Has there been independent confirmation of the results?
I anneal to increase brass life and on the *belief* that it will reduce neck tension variability and reduce velocity SD. I use the Giraud because I have it, am comfortable that I can get in the "window" of effective annealing each time I set it up, and because it saves me time since it's automated.
If I didn't have the Giraud, I may have the AMP, but I'm not sure because with all the needed case holders it would be over 3x the cost of the Giraud and it would cost me more time (which is more $$$) to anneal substantially sized batches of brass. The set-up time of the Giraud is, economically speaking, a fixed cost for each batch - so if the batches are large, that time gets subsumed in the overall time savings of loading the hopper with 150 cases, turning your back, and doing something else.
So, you need to ask yourself, if you're going to buy an AMP: 1.) How "perfect" is it really, from lot to lot? 2.) How "perfect" does it really need to be to achieve my goals? 3.) How much does it cost? 4.) How much does it save me (in, say, brass life, or missed targets) and 5.) How much is my time worth?
For me, money is no object, but my time is very valuable, and I'm skeptical I need Promethius or Sartorius level accuracy, or need to weight sort things, or need the AMP to get very good results with my reloads.
But, each person will answer the 5 questions above differently and come up with different conclusions about annealing, salt bath, Giraud, Benchmark, and AMP.
But they will all agree the Mate automation thingie is a POS right now.