The biggest problem with the electric Santos's has been mentioned here before, but happens to be the short "up-north" time. Raising the syphon tube just a bit allows you to control the amount of time the coffee brews for. This is easily done by not seating the top half fully. It will still make a seal, but now will allow you to turn off the brewer after the right amount of time. I have found that vacuum brewers do not require near the same amount of time to brew as other methods. Ideally in the e-santos you want about 90 seconds of a full rolling up-north time. I then kill the heat by just turning it off, and then pour the coffee into a thermal carafe after it is sucked back down.
For the full manual brewers, I have no idea why it would take anyone 30 minutes to make a pot, unless you were using an alcohol spirit lamp. I do pre-heat my water too, but it isn't completely necessary. Usually I put the amount I want in the microwave, go grind my coffee, pour the water in the bottom part, and then put on the top, stick in the glass rod filter, and pour the coffee grounds in. The water will begin to move north almost immediately. Since the manual brews aren't nearly as "violent" as the e-santos, I usually stir the grounds while it is bubbling away. Then I kill the heat after about 2 minutes, and move it to a cool burner, and let the vacuum action take over. Total time, including water heating in the microwave, is about 10 minutes.
C.